2018-08-09T20:41:17Z https://lib.dr.iastate.edu/do/oai/

oai:lib.dr.iastate.edu:icm-1109 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 jsawyer@isatate.edu Iowa State University Sawyer John E. apmallar@iastate.edu Iowa State University Mallarino Antonio P. Agriculture Agronomy and Crop Sciences Soil Science <p>Harvested cornstalk residue (corn stover) after grain harvest has traditional use as bedding and co-feed for livestock. Interest is increasing with other uses, especially for energy production such as direct burning and cellulosic ethanol. The potential growth for cellulosic ethanol is large as two plants in Iowa are either proposed or in initial construction. If proven feasible and economical, cellulosic ethanol production and concurrent stover demand could increase substantially.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/24 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1109&amp;context=icm&amp;unstamped=1 24 event event 1109 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041575 icm/2012/proceedings/24 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1110 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. Agriculture Agronomy and Crop Sciences Soil Science <p>Since 1989 and until the summer of this year, all soil testing laboratories in Iowa and the USA dried soil samples at 35 to 40 ºC (95 to 104 ºF) and ground them before analysis for potassium (K), phosphorus (P), and other nutrients. Since early fall, however, a laboratory that began operations in Iowa is using testing procedures that involve no soil sample drying, and another laboratory operating in Iowa and other states is offering moist soil testing in addition to the commonly used test based on dried samples. These laboratories are using a moist sample handling procedure that the Iowa State University (ISU) Soil and Plant Analysis Laboratory used and recommended from 1963 to 1988. The re-implementation of the moist test by these laboratories has generated many questions from Iowa farmers and crop consultants.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/25 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1110&amp;context=icm&amp;unstamped=1 25 event event 1110 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041576 icm/2012/proceedings/25 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1112 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 amrieck@iastate.edu Iowa State University Rieck-Hinz Angela U.S. Department of Agriculture Hurley Eric G. Agriculture Agronomy and Crop Sciences <p>Increased regulatory pressure, policy-driven programs designed to protect water quality, and a concern to make the most profitable use of manure resources are driving manure management issues. This session will look at some of the current events and practices, changes to the 590 Nutrient Management Standard, and some crystal-ball gazing related to manure nutrient management in Iowa.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/27 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1112&amp;context=icm&amp;unstamped=1 27 event event 1112 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041578 icm/2012/proceedings/27 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1113 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 University of Minnesota Vetsch Jeffrey Agriculture Agronomy and Crop Sciences <p>The agronomic performance of tillage practices is influenced by many factors, some of which the farmer cannot control. The weather, something we have little control over, dramatically affects agriculture and crop production. Our weather (climate) is also changing, which affects the agronomic performance of our cultural practices. In the Midwest, climate change has resulted in increased annual precipitation and greater frequency of intense rainfall events (EPA, 2010). Greater annual rainfall results in cold and wet soils, which reduce the number of days for field operations thus delaying important field operations like planting. Increased precipitation and rainfall intensity increases soil erosion. All of these factors along with soil characteristics (texture, internal drainage, parent material) influence our tillage system choices.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/28 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1113&amp;context=icm&amp;unstamped=1 28 event event 1113 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041579 icm/2012/proceedings/28 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1114 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 malkaisi@iastate.edu Iowa State University Al-Kaisi Mahdi dkwaww@iastate.edu Iowa State University Kwaw-Mensah David Iowa State University Guzman Jose Agriculture Agronomy and Crop Sciences Soil Science <p>Soil conservation is essential to sustain soil quality and improve crop productivity. Soil quality indicators include improved water infiltration and storage, and adequate levels of available soil nutrients for plants and soil carbon. Droughts result from a deficiency of precipitation from statistically normal amounts that when extended makes precipitation inadequate to meet the demands for crop production. Therefore, agriculture is the first economic sector that is visibly impacted by drought because of lack of soil moisture, which affects soil nutrient cycling and crop productivity.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/29 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1114&amp;context=icm&amp;unstamped=1 29 event event 1114 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041580 icm/2012/proceedings/29 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1115 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 hmhanna@iastate.edu Iowa State University Hanna H. Mark mhelmers@iastate.edu Iowa State University Helmers Matt Agriculture Bioresource and Agricultural Engineering <p>Profitability and environmental sustainability are major objectives in crop production. Decisions on whether to till and what operation to use have direct impact on these objectives. Because of potential adverse affects on soil erosion, structure, aggregate stability, and general soil health, potential for benefits should be carefully considered prior to field operations. Tillage objectives include soil loosening, incorporation of fertilizer or pesticide, weed control, and surface leveling after prior tillage to accommodate planting. Reducing surface residue cover may allow topsoil to warm faster in spring, promote soil drying, and alter the environment for some disease pathogens. Conversely, soil on sloping areas is exposed to longer term degradation by erosion and moisture loss in dry conditions is counterproductive.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/30 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1115&amp;context=icm&amp;unstamped=1 30 event event 1115 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041581 icm/2012/proceedings/30 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1116 2017-11-14T00:00:14Z publication:proceedings publication:press publication:icm

2012-11-28T00:00:00-08:00 dalaird@iastate.edu Iowa State University Laird David Agriculture Agronomy and Crop Sciences <p>Biochar is basically charcoal. The term “charcoal” is preferred when the material is use as a fuel for cooking or heating, whereas the term “biochar” is appropriate when the material is use as a soil amendment. In recent years there has been rapid growth in interest in biochar among soil scientists, environmentalists, and entrepreneurs.</p> https://lib.dr.iastate.edu/icm/2012/proceedings/31 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1116&amp;context=icm&amp;unstamped=1 31 event event 1116 2017-11-13T16:00:14-08:00 Proceedings of the Integrated Crop Management Conference 11041582 icm/2012/proceedings/31 2012-11-28T00:00:00-08:00 2012-11-28T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1117 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 University of Illinois Nafziger Emerson D. Agriculture Agronomy and Crop Sciences <p>There has been a great deal of recent interest in “bioenergy” crops that could be burned to generate electricity or heat or used as a feedstock in the manufacture of liquid fuels. Cornstalks represent one of the major “biomass” sources that currently exist. Because today’s healthy, high-yielding hybrids leave behind stalks that present a management challenge, some people are wondering why we don’t help solve both problems—the need for biomass and the difficulty of managing residue—by harvesting cornstalks to use as fuel.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/1 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1117&amp;context=icm&amp;unstamped=1 1 event event 1117 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071304 icm/2013/proceedings/1 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1118 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 University of Kentucky Lee Chad Agriculture Agronomy and Crop Sciences <p>There is a large push to increase soybean yields. Numerous products and ideas claim to increase yield. Which ones work? We will highlight the key factors that increase yields and profits.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/2 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1118&amp;context=icm&amp;unstamped=1 2 event event 1118 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071305 icm/2013/proceedings/2 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1119 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 Iowa State University Elmore Roger W. Agriculture Agronomy and Crop Sciences <p>This presentation covers corn management ideas—whether valid or invalid—based on scientific findings and some notions. Topics include responses to narrow rows and plant populations as well as ‘mystery’ yield losses after physiological maturity.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/3 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1119&amp;context=icm&amp;unstamped=1 3 event event 1119 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071307 icm/2013/proceedings/3 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1120 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 Iowa State University Elmore Roger W. Agriculture Agronomy and Crop Sciences <p>How well are we managing our resources? Genetic? Transgenic? Residue? Soils? Water?</p> https://lib.dr.iastate.edu/icm/2013/proceedings/4 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1120&amp;context=icm&amp;unstamped=1 4 event event 1120 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071308 icm/2013/proceedings/4 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1121 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chat Agricultural and Resource Economics Agricultural Economics Economics <p>With the government shutdown in October, there were a lot of questions about how the agricultural markets would react. Would the lack of data from USDA have a significant impact on the day-to-day variation in the markets? Would market volume diminish given the lack of information? Well, the general answer turned out to be that the crop markets continued on as normal. Farmers and traders fell back onto private source data and continued to market and move crop. Combines rolled and the harvest proceeded as usual. And for the second straight year, the most common refrain, at least in central Iowa, was that the crops were “better than expected.”</p> https://lib.dr.iastate.edu/icm/2013/proceedings/5 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1121&amp;context=icm&amp;unstamped=1 5 event event 1121 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071310 icm/2013/proceedings/5 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1122 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 hmhanna@iastate.edu Iowa State University Hanna H. Mark schweitz@iastate.edu Iowa State University Schweitzer Dana D. Agriculture Bioresource and Agricultural Engineering Oil, Gas, and Energy <p>Iowa agriculture spends about one billion dollars annually on the purchase of diesel fuel, electricity, propane, gasoline and natural gas. The actual amount fluctuates with the rise and fall of energy prices.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/6 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1122&amp;context=icm&amp;unstamped=1 6 event event 1122 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071311 icm/2013/proceedings/6 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1124 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 U.S. Department of Agriculture Mitchell Rob Agriculture Agronomy and Crop Sciences Oil, Gas, and Energy <p>Switchgrass (Panicum virgatum) is native to every U.S. state east of the Rocky Mountains, is the most advanced herbaceous perennial bioenergy feedstock, and best management practices (BMPs) have been developed for bioenergy production in most agro-ecoregions. Additionally, big bluestem (Andropogon gerardii), indiangrass (Sorghastrum nutans), and sideoats grama (Bouteloua curtipendula) are native perennial warm-season grasses and are promising bioenergy feedstocks, especially when planted in low-diversity mixtures. BMPs have been developed for big bluestem, indiangrass, and sideoats grama specifically for the Great Plains and Midwest. Perennial grasses likely will be grown on cropland that is marginally productive for row crops, similar to land enrolled in the Conservation Reserve Program (CRP).</p> https://lib.dr.iastate.edu/icm/2013/proceedings/8 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1124&amp;context=icm&amp;unstamped=1 8 event event 1124 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071318 icm/2013/proceedings/8 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1125 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 kljacobs@iastate.edu Iowa State University Jacobs Keri Agricultural and Resource Economics Agricultural Economics Economics Oil, Gas, and Energy <p>Through policies and programmatic commitments, the United States is exploring the use of alternative transportation fuels as means to meet the growing global demand for energy and the nation’s RFS targets. The CenUSA Bioenergy project is a five year, multi-state, and multi-disciplinary coordinated research and education effort to develop a sustainable system for the production of biofuel feedstocks derived from perennial grasses on land marginal for row crop production. Now in its 3 year, the project, funded by the USDA under the NIFA-AFRI Sustainable Biofuels Initiative (project #2010-05074), focuses on the production of perennial grasses integrated within the row crop landscape in the region consisting of Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin. CenUSA is comprised of researchers, scientists, and educators working in nine objective areas to move the project forward: 1) feedstock development, 2) sustainable production systems, 3) feedstock logistics, 4) system performance, 5) feedstock conversion, 6) markets and distribution, 7) health and safety, 8) education, and 9) extension and outreach.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/9 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1125&amp;context=icm&amp;unstamped=1 9 event event 1125 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071321 icm/2013/proceedings/9 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1126 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 dmuthjr@gmail.com Praxik LLC Muth David J. Jr. jeuken@iastate.edu Iowa State University Euken Jill kmbryden@iastate.edu Iowa State University Bryden Kenneth Mark Agriculture Agronomy and Crop Sciences Bioresource and Agricultural Engineering Mechanical Engineering <p>The emerging cellulosic bioenergy and bioproduct industries can provide several agronomic opportunities. New biomass markets give land managers additional choices that can create revenue, mitigate operational risks, and proactively manage soil quality.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/10 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1126&amp;context=icm&amp;unstamped=1 10 event event 1126 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071322 icm/2013/proceedings/10 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1127 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 U.S. Environmental Protection Agency Frizzell Damon P. Apiculture Entomology <p>A number of factors have been associated with pollinator declines and the losses of managed honey bees (<em>Apis mellifera</em>) in particular. These factors include pests, disease, nutrition, loss of habitat and, pesticides. The EPA has been working aggressively to protect bees and other pollinators from the potential effects of pesticides and has engaged a broad range of stakeholders both domestically and internationally to develop recommendations for assessing and mitigating potential risks of pesticides to bees.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/11 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1127&amp;context=icm&amp;unstamped=1 11 event event 1127 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071323 icm/2013/proceedings/11 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1128 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 aaronjg@iastate.edu Iowa State University Gassmann Aaron J. ewh@iastate.edu Iowa State University Hodgson Erin W. Agriculture Entomology <p>The widespread planting of crops genetically engineered to produce insecticidal toxins derived from the bacterium Bacillus thuringiensis (Bt) places intense selective pressure on pest populations to evolve resistance. Western corn rootworm (WCR) is a key pest of corn and is managed through planting of Bt corn (Gray et al. 2009). Starting in 2009, western corn rootworm in Iowa has imposed severe injury to Bt corn in the field. Laboratory analysis of field populations collected in 2011 revealed resistance to corn producing Bt toxins Cry3Bb1 and mCry3A, and crossresistance between these toxins. These cases of resistance highlight the vulnerability of Bt corn to further evolution of resistance by western corn rootworm; and more broadly, point to need to use an integrated approach when managing this pest and to follow resistance management requirements.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/12 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1128&amp;context=icm&amp;unstamped=1 12 event event 1128 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071325 icm/2013/proceedings/12 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1129 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 ewh@iastate.edu Iowa State University Hodgson Erin W. gregvn@iastate.edu Iowa State University VanNostrand Greg Agriculture Entomology <p>In the north-central region, a few persistent and many occasional insects occur in soybean. A potential mix of pests is likely to happen each growing season, but the severity is not easily predicted between years. Even though pest abundance can be erratic in Iowa soybean, there has been a steady adoption of insecticidal seed and foliar treatments over the last decade (Ragsdale et al. 2011). In order to preserve chemical efficacy and improve profit margins in soybean, we encourage farmers to use Integrated Pest Management, or IPM. The use of proactive IPM tools is an ideal way to manage a pest complex that often occurs in soybean. Examples of IPM for soybean aphid include genetic, cultural and chemical control; sampling; and knowledge of crop economics (Hodgson et al. 2012). Management of two important Iowa soybean pests, soybean aphid and twospotted spider mite, will be reviewed in this article.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/13 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1129&amp;context=icm&amp;unstamped=1 13 event event 1129 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071329 icm/2013/proceedings/13 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1130 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 North Dakota State University Secor Gary North Dakota State University Rivera-Varas Viviana U.S. Department of Agriculture Bolton Melvin North Dakota State University Khan Mohamed Agriculture Plant Pathology <p>Cercospora leaf spot (CLS), caused by the fungus Cercospora beticola, is the most important foliar disease of sugarbeet throughout the world. It causes disease by reducing the photosynthetic area of leaves and producing a toxin that damages leaf cells. CLS has become endemic in the Red River Valley sugarbeet production area of eastern North Dakota and western Minnesota that accounts for about 60% of the total US crop, producing 13 million metric tons with yields of 42-28 mt/ha.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/14 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1130&amp;context=icm&amp;unstamped=1 14 event event 1130 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071330 icm/2013/proceedings/14 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1132 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 Iowa State University Saalau-Rojas Erika dsmuelle@iastate.edu Iowa State University Mueller Daren alisonr@iastate.edu Iowa State University Robertson Alison Agriculture Plant Pathology <p>Because of the late planting and dry weather during the bulk of the season, corn diseases were of minor importance this year in Iowa. A few “common” diseases, such as common smut and common rust, were found at higher than usual levels, but this was field specific. A few interesting diseases “popped” up late.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/16 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1132&amp;context=icm&amp;unstamped=1 16 event event 1132 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071334 icm/2013/proceedings/16 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1133 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 dsmuelle@iastate.edu Iowa State University Mueller Daren Agriculture Plant Pathology <p>Much of the sudden death syndrome research is funded through the soybean check off from Iowa Soybean Association, North Central Soybean Research Program, and the United Soybean Board. Recently, ISU received USDA and some industry funding as well to research this disease. We thank all of our sponsors for this research.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/17 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1133&amp;context=icm&amp;unstamped=1 17 event event 1133 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071335 icm/2013/proceedings/17 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1134 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 alisonr@iastate.edu Iowa State University Robertson Alison Agriculture Plant Pathology <p>A pathosystem is an ecosystem in which parasitism occurs. Parasitism of corn by Colletotrichum graminicola results in anthracnose, an important disease of corn. The disease has three distinct phases: 1. Anthracnose leaf blight that usually occurs between V2 and V12; 2. Anthracnose top dieback that usually occurs from R4 onwards; and 3. Anthracnose stalk rot that is usually prevalent around physiological maturity. Colletotrichum graminicola was not considered an economically important pathogen of corn until the early 1970s. Today it seems like almost every cornfield has plants infected with the pathogen.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/18 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1134&amp;context=icm&amp;unstamped=1 18 event event 1134 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071336 icm/2013/proceedings/18 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1135 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 bjlang@iastate.edu Iowa State University Lang Brian kennethp@iastate.edu Iowa State University Pecinovsky Kenneth Agriculture Agronomy and Crop Sciences <p>Within the last few years, EPA approved pesticide labels for a few foliar fungicide products for use in alfalfa production. However, university research regarding potential economic benefits of these products are extremely limited. In addition, aggressive salesmanship recommending multiple applications per season raises concerns with proper stewardship for these products to insure long-term effectiveness.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/19 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1135&amp;context=icm&amp;unstamped=1 19 event event 1135 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071338 icm/2013/proceedings/19 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1137 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 mdowen@iastate.edu Iowa State University Owen Micheal D. K. Agriculture Agronomy and Crop Sciences Weed Science <p>Weed management in 2014 will continue to be more challenging regardless of the weather. Factors such as prevented planting, poor weed control in 2013, increasing populations of weeds with evolved herbicide resistances and recently, the discovery of Palmer amaranth in Iowa will make weed control decisions interesting. However, other factors such as grower and dealer attitudes, promotional incentives, desire for simple and convenient tactics and perceived costs of more diverse alternative approaches to weed management programs are still primary considerations impacting weed control. Increasing the diversity of weed management tactics will improve the consistency of weed control, mitigate herbicide-resistant weeds and increase profitability. However, these tactics will require more planning, time, and possibly higher initial costs; to effectively diversify weed management requires that fields be considered individually and possibly unique strategies for each field. All possible “tools” should be considered and as many as possible included. There is a long history demonstrating that simple and convenient approaches to pest management, and in particular weed management will inevitably fail biologically and economically. The objectives of this paper are to provide an update of changes in the industry that may impact weed management decisions for 2014, review the state of herbicide resistant weeds in Iowa, provide some information about alternative weed management tactics and list some perspectives about weed management decisions.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/21 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1137&amp;context=icm&amp;unstamped=1 21 event event 1137 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071341 icm/2013/proceedings/21 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1138 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 hartzler@iastate.edu Iowa State University Hartzler Bob Agriculture Agronomy and Crop Sciences Weed Science <p>Palmer amaranth is native to the Southwestern United States, but its range has expanded over the past 50 years. The first documented occurrence in Iowa was this year, although with these infestations it is clear that the weed was initially introduced to the state prior to 2013. It has been a serious problem in the south, and gained national notoriety after developing resistance to glyphosate and devastating the cotton industry in the Southeast. This paper will review why the weed has garnered such attention and access the threat it poses to Iowa.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/22 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1138&amp;context=icm&amp;unstamped=1 22 event event 1138 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071344 icm/2013/proceedings/22 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1139 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 mdowen@iastate.edu Iowa State University Owen Micheal D. K. Agriculture Agronomy and Crop Sciences Weed Science <p>The universal truths of the survival of the fittest and the inevitability that organisms will adapt to whatever environmental factors they encounter have been the most important management considerations to achieving success in agronomic endeavors since mankind transitioned from a hunter/gatherer existence to the agrarian society that has existed for more than six millennia.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/23 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1139&amp;context=icm&amp;unstamped=1 23 event event 1139 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071346 icm/2013/proceedings/23 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1140 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. jsawyer@iastate.edu Iowa State University Sawyer John E. Agriculture Agronomy and Crop Sciences Soil Science <p>This article highlights revisions to Iowa State University (ISU) soil-test interpretations and application guidelines for phosphorus (P), potassium (K) and lime in the updated ISU extension publication PM 1688 “A General Guide for Crop Nutrient and Limestone Recommendations in Iowa”. The previous update to this publication was in 2002. Field research is conducted as issues or questions arise to assure that nutrient management suggestions are up to date. This research has indicated that some recommendations should not be changed, but that others needed significant changes to optimize nutrient management to improve the profitability and sustainability of crop production.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/24 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1140&amp;context=icm&amp;unstamped=1 24 event event 1140 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071350 icm/2013/proceedings/24 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1141 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 jsawyer@iastate.edu Iowa State University Sawyer John E. Agriculture Agronomy and Crop Sciences Soil Science <p>Periods of wetness and dryness extremes can have dramatic effects on available N supply from soil and loss of applied nitrogen (N) from fertilizer and manure. Such effects can happen quickly, as recently occurred with the large profile nitrate levels in the fall following the drought of 2012 and then the losses with excessive precipitation in the spring 2013. Compared to “normal” moisture and temperature conditions, seasonal differences can significantly reduce or increase needed N applications and cause variation in yearly optimal N rates (Fig. 1). Therefore, opportunity exists for seasonal refinement of N application rate. However, based on analysis of the Corn N Rate Calculator (http://extension.agron.iastate.edu/soilfertility/nrate.aspx) database for Iowa, the maximum added profit if the optimum N rate for each trial site could be applied instead of the MRTN rate would only be $22/acre for corn following corn (CC) and $16/acre for corn following soybean (SC); based on $0.50/lb N and $5.00/bu corn. Cost for site-specific N management (ex. information and N application) would subtract from the added profit.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/25 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1141&amp;context=icm&amp;unstamped=1 25 event event 1141 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071351 icm/2013/proceedings/25 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1142 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 mhelmers@iastate.edu Iowa State University Helmers Matthew J. Agriculture Bioresource and Agricultural Engineering <p>With the release of the Iowa Nutrient Reduction Strategy (2013) in early 2013 there has been increased interest in what practices can be utilized by farmers to reduce nutrient export to downstream water bodies. As highlighted by the ISU Extension and Outreach Special Publication 235 (2013) there are many in-field, land use, and edge-of-field practices that have potential to reduce nutrient export. However, to reach the nutrient load reduction goals of 45% on both nitrate-N and phosphorus will require a combination of practices. As a result, there is a need to examine individual fields or small watersheds considering the range of practices to assess how the practices can be combined to reach the desired outcomes. In this paper, we consider a case study watershed of about 1200 acres and examine individual and combinations of practices to reduce nitrate-N export from this area.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/26 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1142&amp;context=icm&amp;unstamped=1 26 event event 1142 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071354 icm/2013/proceedings/26 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1143 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 malkaisi@iastate.edu Iowa State University Al-Kaisi Mahdi Agriculture Agronomy and Crop Sciences Soil Science <p>Management and tillage decision is one of several decisions farmers have to make every fall. However, there are many other factors that need to be considered when selecting a tillage system for any given field, or region within the state. Those factors are soil conditions, which include soil slope, soil drainage, topsoil depth or the A-horizon depth. Other equally important factors that need to be considered are hybrid selection, crop rotation, and management factors, such as residue cover, type of residue (corn or soybean), soil moisture condition at the time of making the decision, timing of tillage operation, fertilizer management in conjunction with tillage operation, type of residue management equipment, planting and harvesting equipment, compliance with conservation plans, and above all, the economic return and benefits for selecting the tillage system.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/27 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1143&amp;context=icm&amp;unstamped=1 27 event event 1143 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071355 icm/2013/proceedings/27 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1144 2017-11-17T21:06:09Z publication:proceedings publication:press publication:icm

2013-12-04T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. Agriculture Agronomy and Crop Sciences Water Resource Management <p>Public concerns about agriculture impacts on water quality and the likelihood of further regulation have been increasing. The uninformed public and many in regulatory government agencies see reducing fertilization rates as an effective way of reducing nutrient loss from fields and improving water quality, especially when animal manure is applied.</p> https://lib.dr.iastate.edu/icm/2013/proceedings/28 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1144&amp;context=icm&amp;unstamped=1 28 event event 1144 2017-11-17T13:06:09-08:00 Proceedings of the Integrated Crop Management Conference 11071356 icm/2013/proceedings/28 2013-12-04T00:00:00-08:00 2013-12-04T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1145 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 setaylor@iastate.edu Iowa State University Taylor Elwynn Agriculture Agronomy and Crop Sciences Climate <p>The Midwest suffered the first drought since 1988 during 2012. Chances are that event opened a period of crop weather that will have greater variability (a mixture of very good and of very bad crop years) than we have seen since before 1996.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/1 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1145&amp;context=icm&amp;unstamped=1 1 event event 1145 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072101 icm/2014/proceedings/1 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1146 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics <p>Useful to Usable (U2U): Transforming Climate Variability and Change Information for Cereal Crop Producers, is a USDA-funded research and extension project designed to improve the resilience and profitability of U.S. farms in the Corn Belt amid a changing climate. The team of over 50 faculty, staff, and students from nine Midwestern universities are experts in applied climatology, crop modeling, agronomy, cyber-technology, agricultural economics, and other social sciences. We are working together, and with members of the agricultural community, to develop decision support tools, resource materials, and training methods that lead to more effective decision making and the adoption of climate-resilient practices.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/2 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1146&amp;context=icm&amp;unstamped=1 2 event event 1146 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072102 icm/2014/proceedings/2 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1147 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Oklahoma State University Ferrell Shannon L. Agricultural and Resource Economics Agricultural Economics Economics <p>“Big Data” receives almost as much discussion in agriculture as the weather and commodity prices. But what is Big Data anyway, and why should farmers care? This article aims to pull back the curtain on Big Data and reveal its advantages and disadvantages for farmers. The discussion then turns to the concerns farmers express about disclosing farm data, and provides concrete solutions for what they can do individually and collectively to address those concerns.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/3 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1147&amp;context=icm&amp;unstamped=1 3 event event 1147 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072104 icm/2014/proceedings/3 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1148 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 darr@iastate.edu Iowa State University Darr Matt Agriculture Bioresource and Agricultural Engineering <p>The digital transformation of row crop agriculture has been a work in progress for over 20 years. It started with the development of combine yield monitoring equipment in 1992, gained additional traction with the adoption of GPS targeted soil sampling in the mid 1990’s, and developed into a major ag industry by the mid 2000’s as documented by widespread adoption of autosteering and section control technology. Precision agriculture initiatives focused on right time, right place, and right rate input management as well as waste reduction associated with automated machine controls has played a key role in improving on-farm productivity and profitability in the last two decades of agriculture. Over the past 18 months there has been strong growth in a new industry that promises additional advances in management and decision tools that can further improve on-farm profitability. This new industry goes by many different names including Big Data, Decision Agriculture, and Digital Agriculture. While the terminology may vary, the goals are consistent—to merge ag production data, complex weather and environment models, satellite and UAV imagery, and crop input choices into a comprehensive decision support solution which empowers producers to make more informed, lower risk, and broadly sustainable decisions.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/4 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1148&amp;context=icm&amp;unstamped=1 4 event event 1148 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072107 icm/2014/proceedings/4 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1149 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>The month of October provided a bounce back for the 2014 crop outlook. While supplies are still more than ample, the trade has shifted its focus to demand. And that shift has put prices on an upward march. The price recovery has come just as the bulk of the Iowa crop production exits the field.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/5 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1149&amp;context=icm&amp;unstamped=1 5 event event 1149 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072109 icm/2014/proceedings/5 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1150 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 plastina@iastate.edu Iowa State University Plastina Alejandro Agricultural and Resource Economics Agricultural Economics Agriculture Law Public Economics <p>The 2014 Farm Bill introduced several changes to the commodity programs available through the Farm Service Administration (FSA) and created a new insurance program to complement one commodity program through the Risk Management Agency (RMA).This article provides an overview of the new safety net available to Iowa crop farmers from 2014 to 2018, explains the timing of the decisions involved in selecting a farm program, and highlights the factors that affect program election through three numerical examples.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/6 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1150&amp;context=icm&amp;unstamped=1 6 event event 1150 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072111 icm/2014/proceedings/6 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1151 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Iowa State University Hoque Mainul gartz@iastate.edu Iowa State University Artz Georgeanne chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>To reach the cellulosic biofuel mandate set for 2022 in the US, perennial grasses, such as Giant Miscanthus and the newly introduced “Liberty” switchgrass, are expected to play a significant role as a promising feedstock for cellulosic ethanol. These grasses can grow well in the many parts of the U.S., especially in areas with ample rainfall. Miscanthus and switchgrass can adapt well to marginal land, which implies significant potential for marginal land currently under crop or forage production, and land currently enrolled in the Conservation Reserve Program to be converted into future commercial-scale biomass production.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/7 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1151&amp;context=icm&amp;unstamped=1 7 event event 1151 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072114 icm/2014/proceedings/7 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1152 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 tatry@iastate.edu Iowa State University Hurburgh Charles R. Agriculture Bioresource and Agricultural Engineering <p>Every year brings on a new set of challenges for harvest and grain management. In the past five years we have gone from very wet to very dry. Scorching heat at the very end of the 2013 season caused large variations in quality even within the same field. In 2014, planting pace was about normal, temperatures were 1-3 degrees below normal and moisture was well above normal—especially in the August and September grain fill period. Western and southwestern Iowa were 3-6 inches over normal for moisture in this period. This combination of weather conditions put the 2014 crop 7-10 days behind normal maturity.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/8 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1152&amp;context=icm&amp;unstamped=1 8 event event 1152 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072115 icm/2014/proceedings/8 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1153 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 hmhanna@iastate.edu Iowa State University Hanna H. Mark schweitz@iastate.edu Iowa State University Schweitzer Dana D. sshouse@iastate.edu Iowa State University Shouse Shawn jharmon@iastate.edu Iowa State University Harmon Jay D. Agriculture Bioresource and Agricultural Engineering <p>Iowa spends about one billion dollars annually on the purchase of diesel fuel, electricity, propane, gasoline, and natural gas. Specifically, Iowa spent more than one billion dollars on energy in 2012 including $866,990,000 for gasoline, fuels, and oils (primarily diesel fuel and LP) and $329,138,000 for utilities (primarily electricity) according to the USDA Agricultural Census (USDA, 2014). Correspondingly, farm enterprises nationwide spent $16,573,188,000 for gasoline, fuels, and oils and $8,261,978,000 for utilities in 2012. Purchases of diesel fuel, liquid propane (LP), and natural gas are included in gasoline, fuels, and oils. Electricity, telephone charges, internet fees, and purchased water are included in utilities costs.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/9 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1153&amp;context=icm&amp;unstamped=1 9 event event 1153 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072116 icm/2014/proceedings/9 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1154 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Iowa Soybean Association Reeg Patrick Iowa Soybean Association Kyveryga Peter Iowa Soybean Association Mueller Tristan Agriculture Agronomy and Crop Sciences <p>During the last 15 years, the Iowa Soybean Association On-Farm Network® has developed and adopted a variety of tools to conduct on-farm studies to improve efficiency and profitability in crop production by engaging farmers in participatory learning. The information collected enables farmers to make informed decisions by examining results of on-farm studies evaluating different products and management practices.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/10 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1154&amp;context=icm&amp;unstamped=1 10 event event 1154 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072117 icm/2014/proceedings/10 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1155 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Iowa Soybean Association Mueller Tristan Iowa Soybean Association Reeg Patrick Iowa Soybean Association Kyveryga Peter Agriculture Agronomy and Crop Sciences <p>Farmers are interested in better management of seeding rates within soybean fields to increase productivity andeconomic returns. With seed prices trending higher and soybean commodity prices trending lower during the lasttwo years, there are many questions about optimal seeding rates and factors that influence these rates under specificfield conditions.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/11 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1155&amp;context=icm&amp;unstamped=1 11 event event 1155 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072119 icm/2014/proceedings/11 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1156 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 University of Nebraska–Lincoln Lee Don Agriculture Agronomy and Crop Sciences Bioresource and Agricultural Engineering Biotechnology Horticulture <p>If you would answer yes to the questions below, then you would benefit from understanding biotechnology: 1. Do farmers ask me to predict the work-load consequences of making different seed product choices? 2. Would the farmers I serve be happy if I can help them slow the evolution of their pest populations? 3. Can I describe how biotechnology will develop to bring new approaches to addressing crop management problems in the future? and 4. Am I considered an expert in my community on the science behind our food production system? This session will provide a chance to explore several on-line resources that can be used to put an agronomist in position to expand their understanding of biotechnology and work more effectively as a professional.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/12 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1156&amp;context=icm&amp;unstamped=1 12 event event 1156 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072120 icm/2014/proceedings/12 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1157 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 spbrad@iastate.edu Iowa State University Bradbury Steven P. Agriculture Entomology <p>Recent US Environmental Protection Agency (EPA) pesticide regulations are establishing national performance expectations with varying degrees of flexibility for implementation at the state and local level. For example, EPA decisions concerning pesticide resistance management and pollinator, endangered species and water quality protection create opportunities for designing and specifying regional, state and/or local pesticide use requirements and practices consistent with conditions specified in Federal pesticide registrations. The regulations are highlighting the role Integrated Pest Management (IPM) and site-specific pest management decisions could play in this evolving paradigm.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/13 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1157&amp;context=icm&amp;unstamped=1 13 event event 1157 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072121 icm/2014/proceedings/13 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1158 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Iowa Department of Agriculture and Land Steward ship Paluch Gretchen Agriculture Agronomy and Crop Sciences <p>Fundamental concepts of pesticide stewardship are of increasing importance to support the future of Iowa agriculture. Pesticide applicators are depended upon to integrate these concepts into current crop production practices that face numerous challenges including resistance in pest populations, changes in technology, shifting land use management practices, and the rising costs of production. The complexity of agricultural production and instant access to information empowered by modern technologies are placing increasing importance on efficiency of decision-making practices and communication of on-site assessment.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/14 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1158&amp;context=icm&amp;unstamped=1 14 event event 1158 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072122 icm/2014/proceedings/14 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1159 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 University of Minnesota Reuter Gary S. Apiculture Entomology <p>Crops in the United States valued at over $18.9 billion dollars per year require pollination. Worldwide the figure is over $217 billion. Without bees to pollinate our grocery shelves would contain some boring food. I like pasta but some flavorful sauce to put on it sure is nice.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/15 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1159&amp;context=icm&amp;unstamped=1 15 event event 1159 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072123 icm/2014/proceedings/15 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1160 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 ewh@iastate.edu Iowa State University Hodgson Erin W. U.S. Department of Agriculture Leskey Tracy C. Agriculture Entomology <p>Brown marmorated stink bug (BMSB), Halyomorpha halys (Hemiptera: Pentatomidae), is an invasive pest from eastern Asia. This species was first confirmed in the United States in 1998 near Allentown, Pennsylvania. It is believed individuals were accidentally introduced with packing crates from China or Japan. Since 1998, BMSB has rapidly spread to 41 states and the District of Columbia (Leskey et al. 2014). Live adults were first detected in Scott County, Iowa in 2012 and have now been confirmed in eight counties as of 2014.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/16 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1160&amp;context=icm&amp;unstamped=1 16 event event 1160 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072124 icm/2014/proceedings/16 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1161 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 mdowen@iastate.edu Iowa State University Owen Micheal D. K. hartzler@iastate.edu Iowa State University Hartzler Robert G. Agriculture Agronomy and Crop Sciences Weed Science <p>Given the environmental conditions in 2013 resulting in delayed herbicide applications and drought later in the summer, the increasing use of “alternative” herbicides and the cool wet conditions in 2014, conditions were excellent for many interesting occurrences. Herbicide carryover was a factor for several products, several products provided evidence why farmers preferred using glyphosate alone, and herbicide-resistant weed populations continue to evolve. It appears that the message of diversity in order to manage herbicide resistance is gaining traction but to the extent that the focus is primarily on herbicides which was the reason that herbicide resistance became such a big issue. There is a need to expand the acceptance of more diversity in weed management.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/17 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1161&amp;context=icm&amp;unstamped=1 17 event event 1161 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072125 icm/2014/proceedings/17 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1162 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 hartzler@iastate.edu Iowa State University Hartzler Bob mjanders@iastate.edu Iowa State University Anderson Meaghan Agriculture Agronomy and Crop Sciences Weed Science <p>The Iowa Nutrient Reduction Strategy and other factors have increased interest in fitting cover crops into Iowa’s cropping systems. The benefits of cover crops are well documented, and include reducing erosion, nutrient losses, and soil compaction. Legume cover crops such as hairy vetch may contribute nitrogen via biological fixation. The extended period of plant growth during times when soil is often left bare also is beneficial for overall soil health. Finally, cover crops can complement weed management programs by suppressing the establishment of weeds. This paper will focus on the interactions between cover crops, weeds and current weed management programs.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/18 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1162&amp;context=icm&amp;unstamped=1 18 event event 1162 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072127 icm/2014/proceedings/18 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1163 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 dsmuelle@iastate.edu Iowa State University Mueller Daren Agriculture Plant Pathology <p>Herbicide resistant weeds have been in the news quite frequently lately, and rightfully so. Their existence is changing how farmers currently manage weeds in corn and soybean fields. But resistance to pesticides is not limited to weeds. Fungi that cause crop disease can also develop resistance to fungicides. This presentation will cover the basics of fungicide resistance and outline ways to avoid or delay fungicide resistance from occurring. Some of this research is funded through the soybean check off from Iowa Soybean Association and the United Soybean Board. We thank our sponsors for this support.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/19 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1163&amp;context=icm&amp;unstamped=1 19 event event 1163 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072128 icm/2014/proceedings/19 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1164 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 dsmuelle@iastate.edu Iowa State University Mueller Daren ykandel@iastate.edu Iowa State University Kandel Yuba lleandro@iastate.edu Iowa State University Leandro Leonor Agriculture Plant Pathology <p>Sudden death syndrome (SDS) was severe in many fields across Iowa in 2014, resulting in yield loss and frustration for farmers. There are a few positive things that we can learn in a year like this, though. For one, many soybean varieties were pushed to their limits, allowing farmers to get a really good evaluation of the genetic resistance for SDS in a variety. Additionally, other beneficial management strategies can be identified that complement variety resistance.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/20 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1164&amp;context=icm&amp;unstamped=1 20 event event 1164 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072130 icm/2014/proceedings/20 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1165 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 South Dakota State University Mathew Febina M. North Dakota State University Markell Samuel G. Agriculture Plant Pathology <p>Diaporthe/Phomopsis species are pathogens on a wide range of hosts including soybeans (Glycine max L.), and responsible for several diseases, some of which are of economic importance. Under favorable environmental conditions, these diseases can result in in significant yield losses (Backman et al. 1985). For example, yield losses from Stem canker in the Midwest have ranged from minor to in excess of 50% (Hartman et al. 1999). Four Diaporthe species have been reported pathogenic on soybean – Diaporthe sojae, the causal agent of pod and stem blight; Diaporthe caulivora and Diaporthe aspalathi, causal agents of Northern and Southern stem cankers, respectively; and Diaporthe longicolla, causing seed decay (Hartman et al. 1999).</p> https://lib.dr.iastate.edu/icm/2014/proceedings/21 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1165&amp;context=icm&amp;unstamped=1 21 event event 1165 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072131 icm/2014/proceedings/21 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1167 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 alisonr@iastate.edu Iowa State University Robertson Alison Agriculture Plant Pathology <p>The 2014 growing season started with good conditions at planting. Above normal precipitation in June however was prevalent across most of the state and likely played a role in infection and development of Northern corn leaf blight (NCLB), Physoderma brown spot and stalk rot, and stalk rot. A dry July brought NCLB to a stand still but frequent precipitation events in August and September enabled further development of the disease. Goss’s wilt was also prevalent on hybrids rated susceptible to moderately susceptible to this disease. Although southern rust was reported, the cooler than normal temperatures in August and September prevented the disease from developing and impacting yields. It was common to notice prematurely dead plants in cornfields at towards the end of grain fill. Diplodia and Gibberella ear rot were also present in some fields.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/23 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1167&amp;context=icm&amp;unstamped=1 23 event event 1167 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072135 icm/2014/proceedings/23 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1168 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 NPK Fertilizer Advisory Service Asbridge David Agriculture Agronomy and Crop Sciences https://lib.dr.iastate.edu/icm/2014/proceedings/24 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1168&amp;context=icm&amp;unstamped=1 24 event event 1168 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072136 icm/2014/proceedings/24 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1169 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 jsawyer@iastate.edu Iowa State University Sawyer John E. Agriculture Agronomy and Crop Sciences Soil Science <p>Yearly nitrogen (N) input is typically required for optimal corn yields in the majority of Iowa crop rotations. The exception would be first-year corn following established alfalfa where none to only a small N input is typically needed. If not fertilized with N over time, corn yield will be very limited as the soils ability to supply plantavailable N becomes depleted.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/25 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1169&amp;context=icm&amp;unstamped=1 25 event event 1169 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072138 icm/2014/proceedings/25 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1170 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. Iowa State University Enderson Joshua T. mazhar@iastate.edu Iowa State University Haq Mazhar U. Agriculture Agronomy and Crop Sciences Soil Science <p>Micronutrients such as boron (B), chloride (Cl), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) are essential plant nutrients taken up by crops in very small amounts, but a deficiency can have profound effects on yield because they perform important physiological functions. Deficiencies seldom are observed or are widespread in Iowa and neighboring states. Farmers and crop consultants have been asking questions, however, concerning possible yield loss due to deficiency of micronutrients in corn and soybean.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/26 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1170&amp;context=icm&amp;unstamped=1 26 event event 1170 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072139 icm/2014/proceedings/26 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1171 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. Agriculture Agronomy and Crop Sciences Soil Science <p>Crop prices are decreasing after several years of good prices and public concerns about nutrient application impacts on water quality are increasing. The profitability of nutrient management can be increased and impacts on water quality can be decreased by using a variety of precision agriculture technologies.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/27 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1171&amp;context=icm&amp;unstamped=1 27 event event 1171 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072141 icm/2014/proceedings/27 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1172 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 Iowa Soybean Association Kyveryga Peter Iowa Soybean Association Reeg Pat Iowa Soybean Association Mueller Tristan Iowa State University Anderson Chris Agriculture Agronomy and Crop Sciences Soil Science <p>A substantial amount of the uncertainty and unpredictability related to corn nitrogen (N) management across the Midwest can be attributed primarily to several common risk factors: (1) environmental losses of N to water or air, (2) economic penalties from over or under applications of N, and (3) difficulties of quantifying the supply of nitrogen available from the soil, and therefore, making adjustments for in-season weather. Rainfall plays a crucial role in controlling all of these risk factors, but its effects on N management are difficult to quantify when making management decisions for unobserved or future situations.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/28 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1172&amp;context=icm&amp;unstamped=1 28 event event 1172 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072142 icm/2014/proceedings/28 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1173 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 benning@iastate.edu Iowa State University Benning Jamie Agriculture Agronomy and Crop Sciences Water Resource Management <p>The Iowa Nutrient Reduction Strategy is a science-based framework that identifies in-field, edge of field, and land use practices that minimize loss of nitrogen and phosphorus to surface water. In addition to reductions in agricultural non-point sources of nutrients, the strategy also identifies reductions for non-agricultural point sources such as municipal wastewater treatment plants. The Hypoxia Task Force identified a goal of reducing the total nitrogen and total phosphorus load by 45%. The Iowa Nutrient Reduction Strategy outlines the effectiveness of the identified agricultural practices to assist farmers in selecting practices individually or in combination to meet their nutrient reduction goals.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/29 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1173&amp;context=icm&amp;unstamped=1 29 event event 1173 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072143 icm/2014/proceedings/29 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1174 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 malkaisi@iastate.edu Iowa State University Al-Kaisi Mahdi Agriculture Agronomy and Crop Sciences Soil Science <p>The perceived effect of no-tillage on soil temperature, soil moisture conditions, soil compaction, soil productivity, and nitrogen movement and availability has become a major concern among producers considering adopting this tillage system. No-tillage presents a unique challenge in poorly drained soils, in which certain surface soil properties are affected due to the absence of tillage as a corrective measure. Effective tillage systems create an ideal seedbed condition (i.e., soil moisture, temperature, and penetration resistance) for plant emergence, plant development, and unimpeded root growth.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/30 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1174&amp;context=icm&amp;unstamped=1 30 event event 1174 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072145 icm/2014/proceedings/30 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1175 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 mhelmers@iastate.edu Iowa State University Helmers Matthew J. Agriculture Bioresource and Agricultural Engineering <p>With the release of the Iowa Nutrient Reduction Strategy in early 2013 there has been increased interest in what practices can be utilized by farmers to reduce nutrient export to downstream water bodies. As highlighted by the ISU Extension and Outreach Special Publication 235 (2013) there are many in-field, land use, and edge-of-field practices that have potential to reduce nutrient export. Three practices that have garnered a substantial amount of interest are cover crops, bioreactors, and wetlands. These three practices span the scale from in-field (cover crops) to edge-of-field (bioreactors) to watershed scale (wetlands).</p> https://lib.dr.iastate.edu/icm/2014/proceedings/31 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1175&amp;context=icm&amp;unstamped=1 31 event event 1175 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072146 icm/2014/proceedings/31 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1176 2017-11-17T23:12:14Z publication:proceedings publication:press publication:icm

2014-12-03T00:00:00-08:00 mliebman@iastate.edu Iowa State University Liebman Matt timyoung@iastate.edu Iowa State University Youngquist Tim kjmoore@iastate.edu Iowa State University Moore Ken jeuken@iastate.edu Iowa State University Euken Jill Agriculture Agronomy and Crop Sciences <p>This session will share learnings from two applied research projects conducted in Iowa that are designed to 1) decrease soil erosion; 2) improve water quality; 3) provide feedstocks for bioprocessors; and, 4) improve farm profitability.</p> https://lib.dr.iastate.edu/icm/2014/proceedings/32 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1176&amp;context=icm&amp;unstamped=1 32 event event 1176 2017-11-17T15:12:14-08:00 Proceedings of the Integrated Crop Management Conference 11072148 icm/2014/proceedings/32 2014-12-03T00:00:00-08:00 2014-12-03T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1177 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 setaylor@iastate.edu Iowa State University Taylor Elwynn Agriculture Agronomy and Crop Sciences Climate <p>Corn yield per acre has been more erratic from 2001-2014 than was experienced from 1981-2000. The year to year volatility of soybean yield is similar to that of corn. The consistency of the pattern of favorable and adverse production years indicates that the management of “weather related risk” to production and marketing during the coming decade will likely be increasingly important to farm profits.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/1 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1177&amp;context=icm&amp;unstamped=1 1 event event 1177 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162759 icm/2015/proceedings/1 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1178 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Wisconsin–Madison Lauer Joe University of Wisconsin–Madison Shi Guanming University of Wisconsin–Madison Chavas Jean-Paul Agriculture Agronomy and Crop Sciences Biotechnology Plant Breeding and Genetics <p>Farmers have adopted biotechnology and genetically engineered (GE) crop technologies quickly. Yield data were analyzed from field experiments over the period 1990-2010 to test the hypothesis that GE corn technologies reduces production risk. GE technology can increase yield, but it also decreases yield for some GE traits. A significant part of the benefits of GE technology comes from protecting corn yield and reducing risk exposure. Gene interactions affect corn productivity through “yield lag” and “yield drag” effects. Often 3 to 4 years are required for new technologies to be equivalent to yields of conventional hybrids.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/2 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1178&amp;context=icm&amp;unstamped=1 2 event event 1178 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162761 icm/2015/proceedings/2 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1179 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 lichtma@iastate.edu Iowa State University Licht Mark alenssen@iastate.edu Iowa State University Lenssen Andy University of Nebraska–Lincoln Elmore Roger Agriculture Agronomy and Crop Sciences Soil Science <p>Since the introduction of hybrid corn in the 1930s, the corn grain yield trend has been increasing in Iowa and across the U.S. Corn Belt. In Iowa, there has been an increase of corn plant densities of approximately 400 plants per acre per year since 2000. Corn grain yield and yield components are greatly influenced by plant densities. Corn grain yields respond to plant densities with a curvilinear or quadratic response if plant densities are increased to supra-optimum densities.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/3 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1179&amp;context=icm&amp;unstamped=1 3 event event 1179 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162765 icm/2015/proceedings/3 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1181 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>While the weather and growing season crop circumstances were different, the 2015 marketing year has some strong parallels with the 2013 and 2014 marketing years. Production is strong enough to meet or exceed demand. Stock levels are holding. And prices remain lower than most producers hoped when they planted the crops. Hence, a good deal of my discussion follows from the outlooks for the 2013 and 2014 crops. So, yes, I sound like a broken record. But there are good reasons why.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/5 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1181&amp;context=icm&amp;unstamped=1 5 event event 1181 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162770 icm/2015/proceedings/5 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1182 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 plastina@iastate.edu Iowa State University Plastina Alejandro Agricultural and Resource Economics Agricultural Economics Economics <p>Profitability, measured as net farm income per acre, peaked in 2011 and has declined every year since. Substantial crop insurance indemnity payments kept profitability above zero for the typical Iowa farm up until 2013. Despite record high yields in 2014 and 2015, lower crop prices and sticky costs of production resulted in negative margins for some producers in 2014, and are likely to result in negative margins for many producers in 2015. Farming on rented land and not fully owned land is the most likely to suffer from negative margins.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/6 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1182&amp;context=icm&amp;unstamped=1 6 event event 1182 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162774 icm/2015/proceedings/6 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1184 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>Useful to Usable (U2U): Transforming Climate Variability and Change Information for Cereal Crop Producers, is a USDA-funded research and extension project designed to improve the resilience and profitability of U.S. farms in the Corn Belt amid a changing climate. The team of over 50 faculty, staff, and students from nine Midwestern universities are experts in applied climatology, crop modeling, agronomy, cyber-technology, agricultural economics, and other social sciences. We have worked together, and with members of the agricultural community, to develop decision support tools, resource materials, and training methods that lead to more effective decision making and the adoption of climate-resilient practices. The five tools listed below have been developed and are available for public use at http://www. agclimate4u.org.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/8 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1184&amp;context=icm&amp;unstamped=1 8 event event 1184 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162780 icm/2015/proceedings/8 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1185 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 wdzhang@iastate.edu Iowa State University Zhang Wendong Agricultural and Resource Economics Agricultural Economics Economics <p>Farmland is arguably the largest single item in a typical investment portfolio of U.S. farmers and USDA Economic Research Service (USDA-ERS) projects nearly $2.3 trillion in real estate equity for the US farm sector in 2014, which accounts for about 85% of the equity for the entire farm sector (USDA-ERS 2015). For Iowa, farmland not only represents the basis for our agricultural production, farmland, including buildings, represents over $259 billion dollars of wealth in the state of Iowa. After enjoying a decade of growth, farmland values in Iowa and in the Midwest is expected to further decline, which sparks recent interests on topics related to land values, land ownership and land tenure. Who owns, buys, and rents Iowa’s farmland, how it is farmed, and who will be vulnerable to potential declines in value are important questions for the future well-being of both Iowa farmers and the agricultural sector in the state in general.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/9 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1185&amp;context=icm&amp;unstamped=1 9 event event 1185 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162785 icm/2015/proceedings/9 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1186 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 tatry@iastate.edu Iowa State University Hurburgh Charles R. erin@iastate.edu Iowa State University Bowers Erin Agriculture Bioresource and Agricultural Engineering <p>While the unexpectedly favorable weather after Labor Day removed most of the potential for crop quality issues, the newly released Food Safety Modernization Act Human Food and Animal Food Preventive Control Rules will have ongoing impact on the grain supply chain from farm to user. Requests by grain users (feed mills, ethanol plants, corn wet mills, and others) for verification of hazard control are likely to become common. Farms and elevators will become a source of risk in users’ required hazard analysis. Most hazards in bulk grain originate in production (mycotoxins, diseases) which will make advance forecasting and monitoring by trained professionals an important element of risk control documentation. Mycotoxin management is an example of the supply chain preventive control that will be needed.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/10 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1186&amp;context=icm&amp;unstamped=1 10 event event 1186 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162789 icm/2015/proceedings/10 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1187 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>Since the passage of the Renewable Fuels Standard, there has been a concerted effort to develop feedstocks for cellulosic biofuels. The CenUSA grant project, headed by Iowa State University, has been exploring the potential for perennial grasses over the past few years. “Liberty” switchgrass, developed by Rob Mitchell, a CenUSA researcher with USDA-ARS in Lincoln, Nebraska, has entered the market as a promising feedstock for cellulosic ethanol. In order to evaluate the potential for switchgrass on the Midwestern landscape, CenUSA researchers have created a decision tool to explore the costs and potential returns from switchgrass production and compare those returns to four alternatives: maintaining the acreage in the Conservation Reserve Program, utilizing the acreage for pasture, planting the acreage in the traditional corn/soybean rotation, or planting the acreage to continuous corn.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/11 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1187&amp;context=icm&amp;unstamped=1 11 event event 1187 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162794 icm/2015/proceedings/11 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1188 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 Iowa Soybean Association Reeg Patrick Agriculture Agronomy and Crop Sciences <p>After attending this session, attendees will gain knowledge on: A background to remote sensing in agriculture; Remote sensing sources and resolution; and On-Farm Network use of remote sensing.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/12 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1188&amp;context=icm&amp;unstamped=1 12 event event 1188 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162798 icm/2015/proceedings/12 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1189 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Nebraska–Lincoln Lee Don Agriculture Agronomy and Crop Sciences Biotechnology Plant Breeding and Genetics <p>If you know a twenty-year-old American consumer, they have spent their entire life living with transgenic crops (GMOs). The opportunity for future farmers to take advantage of established and emerging technologies in genetic engineering and gene editing will depend in part on acceptance by these young consumers.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/13 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1189&amp;context=icm&amp;unstamped=1 13 event event 1189 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162799 icm/2015/proceedings/13 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1190 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Minnesota Koch Robert Agriculture Entomology <p>Pest resistance to insecticides threatens to reduce the already relatively short list of insecticide groups (modes of action) available for management of certain pests and can result in increased production costs. Foliar application of broad-spectrum insecticides is currently the primary tactic for suppression of soybean aphid outbreaks; however, repeated use of insecticides can result in pests developing resistance to insecticides. This presentation will provide an overview of recent research from Minnesota to monitor for insecticide resistance in soybean aphid populations. Insecticide resistance management strategies will also be reviewed in the context of soybean aphid management. To complement this presentation, excerpts from “Insecticide Resistance Management in Soybean,” a University of Minnesota factsheet by Koch, MacRae and Potter (2013) are included here.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/14 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1190&amp;context=icm&amp;unstamped=1 14 event event 1190 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162800 icm/2015/proceedings/14 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1191 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 ewh@iastate.edu Iowa State University Hodgson Erin Iowa State University Dunbar Mike oneal@iastate.edu Iowa State University O'Neal Matt aaronjg@iastate.edu Iowa State University Gassmann Aaron Agriculture Entomology <p>Cover crops can provide many benefits to row crop agriculture, such as reducing water loss and soil erosion, increasing soil organic matter and nutrients, and suppressing weeds. The incorporation of cover crops is also generally perceived as an important forage and refuge for natural enemies of insects and weeds. Diverse agroecosystems that include cover crops can have decreased pest pressure compared to monocultures (Root 1973). For example, soybean aphid populations can be lower in soybean fields with a rye cover crop (Koch et al. 2012).</p> https://lib.dr.iastate.edu/icm/2015/proceedings/15 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1191&amp;context=icm&amp;unstamped=1 15 event event 1191 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162802 icm/2015/proceedings/15 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1192 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 hartzler@iastate.edu Iowa State University Hartzler Bob Agriculture Agronomy and Crop Sciences Entomology <p>Most people are aware of the monarch’s migration to overwintering sites in central Mexico. There are about 11 mountain areas west of Mexico City where the monarchs spend the winter (Figure 1). The elevation of these sites range from 8000 to 12,000 ft, with temperatures ranging from 32 to 59 F. The monarchs cluster in trees to retain heat, occasionally branches break due to the weight of the monarchs. The size of the monarch population is estimated by measuring the area of trees covered with adult butterflies.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/16 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1192&amp;context=icm&amp;unstamped=1 16 event event 1192 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162803 icm/2015/proceedings/16 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1193 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 hartzler@iastate.edu Iowa State University Hartzler Bob Agriculture Agronomy and Crop Sciences Weed Science <p>According to the International Survey of Herbicide Resistant Weeds (http://www.weedscience.org) there are currently 461 unique cases of herbicide-resistant (HR) weeds. The United States leads the way in number of HR weeds, with twice as many as any other country (Table 1). The prevalence of herbicide resistance is determined primarily by the acres under cultivation and type of production systems utilized, rather than how well individual farmers manage weeds. The USA leads the world in HR weeds because we have expansive acreage devoted to production systems heavily reliant on herbicides, not because our farmers are less adept at managing herbicide resistance than their foreign counterparts.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/17 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1193&amp;context=icm&amp;unstamped=1 17 event event 1193 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162805 icm/2015/proceedings/17 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1194 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 mdowen@iastate.edu Iowa State University Owen Micheal D. K. Agriculture Agronomy and Crop Sciences Weed Science <p>Many of the issues that have been problems in the past continue to remain problems. Herbicide resistance continues to evolve, diversity of weed management tactics is slowly changing, and herbicides that attach to new and novel sites of action in weeds have yet to be developed. However, there are some perspectives that are favorable, notably an increase in the use of soil-applied herbicides that provide residual control and the occasional sighting of a row-crop cultivator in 2015. The problem is, in my opinion, overcoming the tendency of farmers to wait until weed problems have increased to the point that resolution is costly and difficult. Generally, weed management is “OK” across the state and the locations with Palmer amaranth have not changed, based on the yearly road trip survey. Certainly the number of soybean fields with weeds visible above the canopy prior to harvest is increasing, but there has not been a notable increase across the state in major weed management failures.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/18 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1194&amp;context=icm&amp;unstamped=1 18 event event 1194 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162806 icm/2015/proceedings/18 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1195 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Nebraska–Lincoln Giesler Loren J. Agriculture Plant Pathology <p>With the current changes in weed management and the onset of glyphosate resistant weed species, soybean farmers are using both additional herbicide modes and action and more preplant herbicide options to supplement glyphosate in their weed management programs. In years with conditions favorable for seedling disease and other disease there are typically concerns and inquiries about the cause(s) of symptoms in agronomic plants. Many of the questions focus on differentiating between plant injuries potentially caused by recent herbicide applications versus symptoms caused by plant pathogens.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/19 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1195&amp;context=icm&amp;unstamped=1 19 event event 1195 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162808 icm/2015/proceedings/19 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1196 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 ezaworski@iastate.edu Iowa State University Zaworski Ed lina@iastate.edu Iowa State University Rodriguez-Salamanca Lina M. Agriculture Plant Pathology <p>Every year the plant and insect diagnostic clinic receives many samples of crop disease and insect problems. Some problems can be readily diagnosed in the field or clinic, but there are always those difficult look-a-like diseases, unique disease symptoms on some hybrids and environmental stressors that can be vexing to us all and make accurate diagnosis more difficult. This presentation will help you identify some of these issues in the field and know when it is best to submit a sample to ISU. A majority of the presentation will consist of clicker question activities followed by discussion. We will also discuss how to use the Plant and Insect Diagnostic Clinic to your advantage.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/20 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1196&amp;context=icm&amp;unstamped=1 20 event event 1196 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162811 icm/2015/proceedings/20 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1197 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Minnesota Malvick Dean Agriculture Plant Pathology <p>Brown stem rot (BSR) is a common and important soilborne disease of soybean in the North Central U.S. and Canada. BSR can reduce yields over 25%, but losses are typically lower due in part to crop rotation and the use of resistant cultivars. Some have suggested that BSR may be the most undermanaged soybean disease in parts of the North Central Region and it doesn’t get the respect it deserves. Although this could be debated, the fact remains that since BSR was first discovered in Illinois about 70 years ago it has been a persistent yet erratic drag on soybean yields in many areas. The BSR pathogen infects the inner stem and can cause damage to leaves, but symptoms often do not develop on leaves and then BSR may be overlooked in the field.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/21 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1197&amp;context=icm&amp;unstamped=1 21 event event 1197 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162813 icm/2015/proceedings/21 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1198 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 University of Wisconsin–Madison Smith Damon L. University of Wisconsin–Madison Willbur Jaime University of Wisconsin–Madison Kabbage Medhi Agriculture Plant Pathology <p>Sclerotinia sclerotiorum, the causal agent for white mold (Sclerotinia stem rot), is a devastating soybean fungal pathogen. In 2006, white mold ranked in the top 10 yield reducing diseases of soybean and was estimated to account for over 2 billion metric tonnes of yield loss world-wide (1). In the United States, soybean losses in 2009 reached an estimated 59 million bushels due to white mold, which cost producers ~$560 million (2, 3). Disease control is limited due to the lack of complete resistance in commercial cultivars and an incomplete understanding of resistance mechanisms (3). Further investigation of white mold resistance mechanisms in soybean and subsequent resistance evaluations of soybean germplasm would improve commercially available resistance.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/22 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1198&amp;context=icm&amp;unstamped=1 22 event event 1198 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162816 icm/2015/proceedings/22 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1199 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 dsmuelle@iastate.edu Iowa State University Mueller Daren Agriculture Plant Pathology <p>One thing is for sure—the 2015 season produced several interesting dilemmas for soybean farmers. Early in the year we had seedling diseases mixed with phytotoxicity from new seed treatments and certain herbicides. During the midseason, some fairly uncommon diseases crept in including soybean viruses and an outbreak of Phyllostica leaf spot. At the end of the season, white mold, Diaporthe and sudden death syndrome (SDS) were common, with SDS being one of the most prominent diseases in 2015. In some parts of Iowa SDS appeared a few weeks earlier than in 2014. Also, as if to add insult to injury, green stem disorder (GSD) was quite prevalent in many parts of the state.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/23 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1199&amp;context=icm&amp;unstamped=1 23 event event 1199 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162818 icm/2015/proceedings/23 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1201 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 alisonr@iastate.edu Iowa State University Robertson Alison Agriculture Plant Pathology <p>The 2015 growing season was cooler and wetter than normal. Several foliar diseases were prevalent including northern corn leaf blight, eyespot, southern rust, Goss’s leaf blight, and Physoderma brown spot. Towards the end of the season, stalk quality was poor across the whole state and standability issues occurred. The most prevalent stalk rot was anthracnose, but Physoderma stalk rot, Gibberella and Fusarium stalk rot were reported.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/25 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1201&amp;context=icm&amp;unstamped=1 25 event event 1201 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162823 icm/2015/proceedings/25 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1202 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 Iowa Soybean Association Mueller Tristan Iowa Soybean Association Kyveryga Peter Agriculture Plant Pathology <p>Soybean cyst nematodes (SCN) are one of the major soybean yield robbers in Iowa. It was estimated that there was more than 11 million bushels of soybeans lost due to SCN in Iowa just in 2014 (Bradley et al., 2015). The primary management of SCN is with resistant soybean varieties. In recent years there have been several nematicidal seed-treatment products introduced to the market that may provide additional protection from SCN. These products can be classified into two broad categories, chemical and biological. Avicta and ILeVO are two of the primary chemical nematicides. Clariva, VOTiVO and N-HIBIT are some of biological nematicides available on the market (Tenuta and Tenuta, 2015).</p> https://lib.dr.iastate.edu/icm/2015/proceedings/26 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1202&amp;context=icm&amp;unstamped=1 26 event event 1202 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162824 icm/2015/proceedings/26 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1203 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 Kansas State University Ruiz Diaz Dorivar Agriculture Agronomy and Crop Sciences <p>Improvements in crop genetics and increased yield potential with a more intensive production system typically involve a greater demand for commercial fertilizers to secure maximum yields. This raises the question about the role of secondary and micronutrient fertilizers to increase yields. Some soil conditions such as high soil pH and low organic matter may also contribute to decrease the supply of micronutrients to crops. Consequently, there is an increasing interest from producers about the potential benefits of micronutrients as complement of their fertilization programs to maximize yields in corn and soybean.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/27 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1203&amp;context=icm&amp;unstamped=1 27 event event 1203 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162825 icm/2015/proceedings/27 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1204 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 jsawyer@iastate.edu Iowa State University Sawyer John E. Agriculture Agronomy and Crop Sciences <p>High-yield corn production would not be possible without adequate nitrogen (N) supply. Unless corn follows established alfalfa, N application from fertilizer or manure is almost always needed in Iowa crop rotations with corn following soybean and corn following corn to meet crop demands. This N fertilization need is especially important considering the recent period of high rainfall years in Iowa where residual N is reduced and N response increased. In dry periods, such as the late 1980’s to early 1990’s, there were field situations where no response to applied N would occur, but that has not happened in the recent time period. For example, late-spring soil nitrate-N test levels when no manure or fertilizer was applied have been consistently below the test critical level in recent N rate research trials (94% below the critical level of 25 ppm nitrate-N from 1999-2014). This is a clear indication of the high N responsiveness in Iowa corn production.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/28 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1204&amp;context=icm&amp;unstamped=1 28 event event 1204 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162826 icm/2015/proceedings/28 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1205 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 apmallar@iastate.edu Iowa State University Mallarino Antonio P. Agriculture Agronomy and Crop Sciences <p>Corn and soybean grain prices have been declining and there is considerable uncertainty about the future. It helps somewhat that the prices of phosphorus (P) and potassium (K) fertilizers and lime have remained approximately constant or have declined slightly. Therefore, producers are thinking of reducing fertilizer or lime application rates. There are a few useful things that producers and crop consultants should consider when making fertilization decisions with unfavorable crop/fertilizer price ratios.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/29 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1205&amp;context=icm&amp;unstamped=1 29 event event 1205 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162829 icm/2015/proceedings/29 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1206 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 malkaisi@iastate.edu Iowa State University Al-Kaisi Mahdi Agriculture Agronomy and Crop Sciences Soil Science <p>The benefits of a healthy soil in sustaining crop production are most evident when growing conditions are less than ideal. Healthy soils increase the capacity of crops to withstand weather variability including short term extreme precipitation events and intra-seasonal drought (Al-Kaisi et al., 2013). The extreme drought in 2012 (Rippey, 2012) resulted in variable yield reduction to corn and soybean production in Iowa with the worst impact on fields with conventional tillage systems (i.e., chisel plow, deep ripping, etc.). Increasingly highly variable weather conditions present increased risks to crops and require more careful attention to conservation planning so as to mitigate impacts on soil health and crop productivity.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/30 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1206&amp;context=icm&amp;unstamped=1 30 event event 1206 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162831 icm/2015/proceedings/30 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1207 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 Iowa State University Lagzdins Ainis mhelmers@iastate.edu Iowa State University Helmers Matthew J. Agriculture Bioresource and Agricultural Engineering <p>Subsurface drainage systems have been intensively installed in the Midwest to enhance agricultural production by removing excess water from naturally poorly drained and somewhat poorly drained agricultural soils. However, despite positive aspects, numerous studies have reported artificial subsurface drainage as one of the primary pathways for nitrate-nitrogen (nitrate-N) loss from agricultural fields to surface water.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/31 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1207&amp;context=icm&amp;unstamped=1 31 event event 1207 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162832 icm/2015/proceedings/31 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1208 2017-11-28T19:48:08Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 Iowa Soybean Association Seeman Anthony christopher-s-jones@uiowa.edu University of Iowa Jones Christopher S. Iowa Soybean Association Kyveryga Peter Iowa Soybean Association Kiel Adam Agriculture Agronomy and Crop Sciences Hydraulic Engineering Water Resource Management <p>Accurate information about water quality trends in agricultural watersheds is needed to inform agricultural policy and quantify the effectiveness of field and landscape management practices. Several studies predicted the increased conversion of soybean and pasture acres to more corn acres driven by corn ethanol production would increase N losses and river nitrate-nitrogen.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/32 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1208&amp;context=icm&amp;unstamped=1 32 event event 1208 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162834 icm/2015/proceedings/32 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1209 2017-11-28T22:55:05Z publication:proceedings publication:press publication:icm

2015-12-01T00:00:00-08:00 hmhanna@iastate.edu Iowa State University Hanna Mark schweitz@iastate.edu Iowa State University Schweitzer Dana lichtma@iastate.edu Iowa State University Licht Mark Agriculture Agronomy and Crop Sciences Bioresource and Agricultural Engineering <p>Reducing operating costs while maintaining productivity and getting the most out of field operations are always important criteria. When grain prices are low, operational savings and improvements directly impact profitability. Field data are shown on tractor and tillage fuel savings strategy and planter closing wheel operation.</p> https://lib.dr.iastate.edu/icm/2015/proceedings/33 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1209&amp;context=icm&amp;unstamped=1 33 event event 1209 2017-11-28T11:48:08-08:00 Proceedings of the Integrated Crop Management Conference 11162837 icm/2015/proceedings/33 2015-12-01T00:00:00-08:00 2015-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1210 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 setaylor@iastate.edu Iowa State University Taylor Elwynn Agriculture Agronomy and Crop Sciences Climate <p>The 2017 crop year follows two years of the 3rd strongest El Niño event since 1950. Historically, very strong El Niño events have only a 25% chance of being followed by a poor crop year. However, there are other factors in play that point to an increasing risk of adverse crop weather during the coming eight years.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/1 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1210&amp;context=icm&amp;unstamped=1 1 event event 1210 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169855 icm/2016/proceedings/1 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1213 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 DuPont Pioneer Van roekel Ryan J. University of Arkansas Purcell Larry C. Agriculture Agronomy and Crop Sciences <p>An understanding of the main factors influencing grain yield in soybean can provide key insights for making management decisions to increase yield. Seed number is determined by the amount of photosynthate produced between R1 and R5 that is allocated to the seeds, divided by the minimum amount of photosynthate needed to keep a single seed from aborting. Stresses or improvements in crop growth prior to flowering should not have a significant impact on final yield, provided that >95% light interception is achieved by R1. Seed weight is determined by the seed growth rate and the length of the seed fill period. Simplified, soybean yield is mainly determined by photosynthate production from R1 to R5 and the length of the seed fill period. Management practices should focus on maximizing photosynthate production during seed set to increase seed number and limiting stresses during seed fill to extend the seed fill duration and increase seed weight.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/4 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1213&amp;context=icm&amp;unstamped=1 4 event event 1213 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169861 icm/2016/proceedings/4 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1214 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 lichtma@iastate.edu Iowa State University Licht Mark Agriculture Agronomy and Crop Sciences <p>Cover crops are frequently being promoted for the impact they have on reducing nutrient and sediment losses as well as improving soil health. There is no doubt that this is the case. Research across the United States has repeatedly proven these benefits. As a result, interest in cover crop use has risen dramatically over the last decade. However, such interest has not lead to widespread adoption of cover crops in Iowa. In 2015 it was estimated that approximately 500,000 acres of cover crops were planted in Iowa. That’s less than a half percent of the row-crop acres. Poor establishment, spring termination, impact on yield, and timing of seeding and termination are frequently cited as reasons cover crops are not adopted. Yet farmer champions can be found across the state that have adopted and excelled in using cover crops. Here are some best management practices that should be considered for beginning cover crop users.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/5 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1214&amp;context=icm&amp;unstamped=1 5 event event 1214 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169864 icm/2016/proceedings/5 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1215 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 hmhanna@iastate.edu Iowa State University Hanna H. Mark Agriculture Bioresource and Agricultural Engineering <p>Checking field conditions to make optimal planter adjustments such as the amount of down force on depth-gauge wheels is required for both automated and manual systems. Operator manuals include the importance of evaluating field conditions and setting adjustments accordingly for factors such as soil moisture, tillage, and texture.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/6 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1215&amp;context=icm&amp;unstamped=1 6 event event 1215 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169867 icm/2016/proceedings/6 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1216 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 tatry@iastate.edu Iowa State University Hurburgh Charles Iowa State University Blake Philip lichtma@iastate.edu Iowa State University Licht Mark hmhanna@iastate.edu Iowa State University Hanna Mark Agriculture Agronomy and Crop Sciences Bioresource and Agricultural Engineering <p>Mystery yield loss, phantom yield loss, and now invisible yield loss – all are terms used for the concept that dry matter (yield) is being lost in-field between maturity (at about 28% moisture) and harvest (approximately 15% moisture). Popular press articles continue to indicate up to 1% dry matter loss per 1% grain moisture decrease. If this amount of dry matter loss occurs it would be significant in marketing terms. Some believe that this loss is caused by seed respiration.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/7 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1216&amp;context=icm&amp;unstamped=1 7 event event 1216 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169868 icm/2016/proceedings/7 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1217 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 tatry@iastate.edu Iowa State University Hurburgh Charles R. Agriculture Bioresource and Agricultural Engineering <p>The 2016 growing season was generally wet with two distinct temperature patterns; hot early during pollination and cooler later. Most of Iowa had 125% up to 200% of normal rainfall to Labor Day, and yet more after Labor Day. The outlook going forward into winter is continued above average temperature. These conditions produced high yield potential at the start of September, but deteriorating quality after Labor Day. Crop quality is normally established by conditions at the very end of the growing season. The massive rains in the Northern third of Iowa complicated the need to move quickly on deteriorating grain.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/8 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1217&amp;context=icm&amp;unstamped=1 8 event event 1217 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169870 icm/2016/proceedings/8 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00

oai:lib.dr.iastate.edu:icm-1218 2017-11-29T17:48:06Z publication:proceedings publication:press publication:icm

2016-12-01T00:00:00-08:00 chart@iastate.edu Iowa State University Hart Chad Agricultural and Resource Economics Agricultural Economics Economics <p>Here we are again. The markets have absorbed record projections for supply and demand, a good amount of crop moved just before harvest to clear out bin space, and harvest has been relatively smooth. That combination of factors took corn prices to new lows and cut the prospects for soybean prices. Whether these prices will be the lows for the harvest season depends on the movement of grain this fall and the willingness of international markets to dive into the crop markets this winter.</p> https://lib.dr.iastate.edu/icm/2016/proceedings/9 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1218&amp;context=icm&amp;unstamped=1 9 event event 1218 2017-11-29T09:48:06-08:00 Proceedings of the Integrated Crop Management Conference 11169871 icm/2016/proceedings/9 2016-12-01T00:00:00-08:00 2016-12-01T00:00:00-08:00 10962313/document-export/200//