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2013 Herbicide Guide For Iowa Corn And Soybean Production, Micheal D. K. Owen Dec 2013

2013 Herbicide Guide For Iowa Corn And Soybean Production, Micheal D. K. Owen

Agriculture and Environment Extension Publications

The success of weed management programs, more specifically herbicide programs, varied considerably during 2012 reflecting the importance of environmental conditions on herbicide performance. Variability of success was seen not only in the postemergence herbicide applications that continue to dominate herbicide use but also in the soil-applied residual herbicides; all herbicide applications were strongly influenced by tillage system, crop planting date, timing and amount of rainfall, and resulting weed emergence timing. While more soil-applied herbicides were used in Iowa during 2012, there are still too many acres of corn and soybean that are treated only with glyphosate. Importantly, the trend of ...


Humic And Fulvic Acids And Their Potential In Crop Production, David Wright, Andrew W. Lenssen Jan 2013

Humic And Fulvic Acids And Their Potential In Crop Production, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Humic and fulvic acids may have uses in Iowa’s large-scale production systems to improve seedling health and plant response to stress. This publication discusses the benefits and limitations of these intriguing organic compounds in soybean production.


Staging Soybean Development, David Wright, Andrew W. Lenssen Jan 2013

Staging Soybean Development, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Accurate growth stage determination of soybean is essential to accurately apply pesticides and determine potential yield loss from environmental stress. This handy publication uses high quality images to enable the user to accurately stage soybean development.


Soybean Response To Drought, Mark A. Licht, David Wright, Andrew W. Lenssen Jan 2013

Soybean Response To Drought, Mark A. Licht, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Drought is a serious but infrequent stressor affecting Iowa soybean production. This publication describes how soybean plant growth and development and nitrogen fixation respond to water deficit conditions. It also discusses simple management practices that have been shown to improve soil water holding capacity.


Intermediate Row Width Can Increase Soybean Profits, David Wright, Andrew W. Lenssen, Virgil L. Schmitt Jan 2013

Intermediate Row Width Can Increase Soybean Profits, David Wright, Andrew W. Lenssen, Virgil L. Schmitt

Agriculture and Environment Extension Publications

Midwest research has documented that soybeans yield better when grown in 15 inch rows. However, there are limitations; some diseases of soybean can eliminate potential yield gains. This publication discusses several factors that should be considered when growing soybean in 15 inch row widths.


Selecting Soybean Varieties, Joel L. Dejong, David Wright, Andrew W. Lenssen Jan 2013

Selecting Soybean Varieties, Joel L. Dejong, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Selecting the right combination of high yielding genetics and agronomic traits is the first management decision toward a successful soybean crop. This publication provides the reader with several tools that can be used to select high yielding soybean varieties best-suited to Iowa growing conditions.


Inoculant Use On Soybean Seed, David Wright, Andrew W. Lenssen Jan 2013

Inoculant Use On Soybean Seed, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Inoculating soybeans with products containing the bacterium Bradyrhizobium japonicum is considered an inexpensive management practice to increase yield. However, yield gain from inoculants on soybean is inconsistent. This publication discusses the benefits and limitations of inoculant use on soybean.


Planting Soybean For High Yield In Iowa, Mark A. Licht, David Wright, Andrew W. Lenssen Jan 2013

Planting Soybean For High Yield In Iowa, Mark A. Licht, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Deciding when to plant soybean is an important management decision that greatly impacts yield. This publication discusses the potential yield increases from early planting and potential yield loss from delayed planting.


Recognizing Challenges To Iowa’S Annual Cropping Systems, David Wright, Andrew W. Lenssen Jan 2013

Recognizing Challenges To Iowa’S Annual Cropping Systems, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Iowa’s soybean and corn cropping systems are among the most productive in the world yet, producing consistently high yields remains uncertain. This publication discusses possible solutions to problems that limit soybean yield in Iowa.


Influence Of Tillage On Soybean Production In Iowa, David Wright, Mahdi Al-Kaisi, Andrew W. Lenssen Jan 2013

Influence Of Tillage On Soybean Production In Iowa, David Wright, Mahdi Al-Kaisi, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Tillage helps manage residue, controls weeds, incorporates soil amendments and is used extensively to prepare a seedbed for planting. However, research shows that tillage has little effect on soybean yields in Iowa. This publication identifies how no-tillage can reduce input costs without sacrificing soybean yield.


Understanding Soybean Plant Population Recommendations For Iowa, Terry L. Basol, David Wright, Andrew W. Lenssen Jan 2013

Understanding Soybean Plant Population Recommendations For Iowa, Terry L. Basol, David Wright, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Concerns over rapidly escalating seed prices have caused farmers, agronomists, and seed suppliers to revisit soybean planting rates. This publication discusses optimum soybean planting rates in Iowa and surrounding states. This is a must read for those who want to reduce their seed input costs


Soybean Nutrient Needs, Clarke Mcgrath, David Wright, Antonio P. Mallarino, Andrew W. Lenssen Jan 2013

Soybean Nutrient Needs, Clarke Mcgrath, David Wright, Antonio P. Mallarino, Andrew W. Lenssen

Agriculture and Environment Extension Publications

Maintaining a fertile growing environment is a risk management strategy that produces higher yield and healthier plants that better manage stress. This publication outlines crop nutrient removal rates, foliar fertilization and the influence of soil fertility on plant health.


Soybean Aphid-Resistant Soybean Varieties For Iowa, Michael T. Mccarville, Erin W. Hodgson, Matthew E. O'Neal Nov 2012

Soybean Aphid-Resistant Soybean Varieties For Iowa, Michael T. Mccarville, Erin W. Hodgson, Matthew E. O'Neal

Agriculture and Environment Extension Publications

The soybean aphid is an economically damaging pest that has caused yield loss in parts of Iowa in seven of the past twelve years. This publication looks at how to choose, when to use, and the effects of aphid-resistant varieties.


Current Challenges In Managing Corn Rootworm, Erin W. Hodgson, Aaron J. Gassmann Nov 2012

Current Challenges In Managing Corn Rootworm, Erin W. Hodgson, Aaron J. Gassmann

Agriculture and Environment Extension Publications

Corn rootworm is a major pest of corn in the United States. In the last decade, Iowa farmers have seen many changes for managing corn rootworm. With the commercial release of transgenic Bt-rootworm corn in 2003, many farmers reduced or eliminated soil-applied insecticides to manage larvae. Western corn rootworm is adapting to transgenic technologies throughout the Corn Belt. Some continuous cornfields have larvae that can now survive at high numbers and cause severe root injury to Bt corn. We encourage farmers to use multiple strategies to protect corn.


Farm Energy: Energy Consumption For Row Crop Production, H. Mark Hanna, John E. Sawyer, Dana Petersen Jun 2012

Farm Energy: Energy Consumption For Row Crop Production, H. Mark Hanna, John E. Sawyer, Dana Petersen

Agriculture and Environment Extension Publications

This publication provides an overview of farm energy use related to corn and soybean production in Iowa. Three areas of row crop production--field operations, fertilizer and pesticide application, and artificial drying--are used to illustrate on-farm energy consumption.


Farm Energy: Energy Considerations For Low-Temperature Grain Drying, Shawn C. Shouse, H. Mark Hanna, Dana Petersen May 2012

Farm Energy: Energy Considerations For Low-Temperature Grain Drying, Shawn C. Shouse, H. Mark Hanna, Dana Petersen

Agriculture and Environment Extension Publications

Harvested corn often requires artificial drying to lower moisture content for safe storage. Learn about energy considerations for drying corn with natural-air or low-temperature systems.


Sensing Nitrogen Stress In Corn, John E. Sawyer, John Lundvall, Jennifer S. Hawkins, Daniel W. Barker Apr 2011

Sensing Nitrogen Stress In Corn, John E. Sawyer, John Lundvall, Jennifer S. Hawkins, Daniel W. Barker

Agriculture and Environment Extension Publications

Determining the proper nitrogen (N) fertilization rate is important for the economic viability of corn production. A desire for high yields, fueled by low fertilizer N costs, led producers to apply rates that ensured adequate N rather than risk costly yield losses due to a shortage of N. Due to water quality concerns and recently high N fertilizer prices, management strategies are needed that can improve the efficiency and profitability of N use. With N application rates based on economic return instead of maximizing productivity, producers want to confirm that rate decisions are working adequately. Also, if unexpected N losses ...


Maintaining Food Safety Through Quality, Charles R. Hurburgh Jr., Daniel D. Loy, John D. Lawrence Oct 2010

Maintaining Food Safety Through Quality, Charles R. Hurburgh Jr., Daniel D. Loy, John D. Lawrence

Agriculture and Environment Extension Publications

Food safety is a worldwide issue affecting millions of people who suffer from diseases caused by contaminated food. An estimated 76 million cases of foodborne disease occur each year in the United States. Policy makers are looking to enhanced quality management systems for tracing food back to its source.

This report will give producers, researchers and consumers a summary of efforts by Iowa State University Extension in food safety, quality management systems and traceability of grain and livestock products.


Farm Energy: Energy Conservation In Corn Nitrogen Fertilization, John E. Sawyer, H. Mark Hanna, Dana Petersen Sep 2010

Farm Energy: Energy Conservation In Corn Nitrogen Fertilization, John E. Sawyer, H. Mark Hanna, Dana Petersen

Agriculture and Environment Extension Publications

Optimum corn yields require nitrogen fertilization in most crop rotations, but the energy consumed during the production of nitrogen fertilizer is considerable. Learn more about maximizing economic, environmental, and energy returns for nitrogen and other fertilizers.


Host Plant Resistance To The Soybean Aphid, Matthew E. O'Neal, Erin W. Hodgson Oct 2009

Host Plant Resistance To The Soybean Aphid, Matthew E. O'Neal, Erin W. Hodgson

Agriculture and Environment Extension Publications

This fact sheet will address how host plant resistance affects the soybean aphid, and summarizes field performance data collected from Iowa.


Resource Conservation Practices: Conservation Buffers And Water Quality, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht Sep 2009

Resource Conservation Practices: Conservation Buffers And Water Quality, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht

Agriculture and Environment Extension Publications

Buffers are designed to intercept sediment and nutrients and reduce soil erosion; they also help enhance air and water quality and fish and wildlife habitats. Learn how to understand, manage, and maintain conservation buffers.


Resource Conservation Practices: Soil Erosion And Water Quality, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht Sep 2009

Resource Conservation Practices: Soil Erosion And Water Quality, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht

Agriculture and Environment Extension Publications

Soil erosion by water and the impact of sediment-attached nutrients on lakes and streams creates problems for both agricultural land and water quality. Learn more about this topic along with conservation and best management practices.


Protecting Bees In Iowa, Elizabeth J. Buffington, Andrew Joseph Jul 2009

Protecting Bees In Iowa, Elizabeth J. Buffington, Andrew Joseph

Agriculture and Environment Extension Publications

Beekeepers and commercial pesticide applicators play important roles in protecting Iowa's bees. This publication outlines actions both groups can take to reduce the risks to bees that benefit Iowa's agroecosystem.


Soybean Drying And Storage, Charles R. Hurburgh Jr. Nov 2008

Soybean Drying And Storage, Charles R. Hurburgh Jr.

Agriculture and Environment Extension Publications

Why would you artifi cially dry a crop that normally dries in the fi eld? One reason would be late planting due to double cropping or wet fi elds, or poor fall weather may result in soybeans that are too wet to store. Second, harvesting early, when soybeans are still wet, reduces fi eld losses, harvest losses, and market weight losses and allows more time for other fall fi eldwork.


Calibration And Uniformity Of Solid Manure Spreaders, H. Mark Hanna, Tom L. Richard Sep 2008

Calibration And Uniformity Of Solid Manure Spreaders, H. Mark Hanna, Tom L. Richard

Agriculture and Environment Extension Publications

This publication outlines how to calibrate dry manure equipment and measure the manure distribution uniformity, and shares results of ISU Extension research comparing rear- and side-delivery spreaders.


Resource Conservation Practices: Consideration In Selecting No-Till, Mahdi Al-Kaisi, H. Mark Hanna, Michael D. Duffy Jul 2008

Resource Conservation Practices: Consideration In Selecting No-Till, Mahdi Al-Kaisi, H. Mark Hanna, Michael D. Duffy

Agriculture and Environment Extension Publications

Consider the advantages of a no-till system. This publication looks at weed control, residue management, equipment requirements, nutrient management and the results of yield and economic return studies.


Resource Conservation Practices: Consider The Strip-Tilling Alternative, Mahdi Al-Kaisi, H. Mark Hanna May 2008

Resource Conservation Practices: Consider The Strip-Tilling Alternative, Mahdi Al-Kaisi, H. Mark Hanna

Agriculture and Environment Extension Publications

Strip-tillage is an alternative to no-till in areas where poorly drained soils are dominant. Read about comparisons of strip-tillage to other tillage systems and the benefits and possible concerns.


Frost Damage To Corn And Soybeans, Charles R. Hurburgh Jr., Garren O. Benson Sep 2007

Frost Damage To Corn And Soybeans, Charles R. Hurburgh Jr., Garren O. Benson

Agriculture and Environment Extension Publications

Freezing temperatures before physiological maturity will damage corn and soybeans. In addition to creating quality problems, premature frost will reduce the yield of dry grain.


Disaster Recovery—Managing Immature Crops For Grain Or Silage, Stephen K. Barnhart, Roger W. Elmore, Palle Pedersen, H. Mark Hanna Dec 2006

Disaster Recovery—Managing Immature Crops For Grain Or Silage, Stephen K. Barnhart, Roger W. Elmore, Palle Pedersen, H. Mark Hanna

Agriculture and Environment Extension Publications

Tips on managing crops that may not mature before the first killing freeze of fall.


Moisture Basis Conversions For Grain Composition Data, Charles R. Hurburgh Jr. Sep 2006

Moisture Basis Conversions For Grain Composition Data, Charles R. Hurburgh Jr.

Agriculture and Environment Extension Publications

Weight percentages change with variations in moisture content. Dry samples have larger percentages of protein, oil, starch, and fiber than wet samples. Calculation of these percentages on a moisture basis other than the actual moisture at the time of test is strictly a mathematical formula.