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Emerging Issues In Integrated Pest Management Implementation And Adoption In The North Central Usa, Thomas W. Sappington Jan 2014

Emerging Issues In Integrated Pest Management Implementation And Adoption In The North Central Usa, Thomas W. Sappington

Entomology Publications

There is a long tradition of integrated pest management (IPM) in the North Central region of the USA. IPM is difficult to define precisely, and it means different things to different people. But in general it is a philosophy based on multiple tactics to prevent a population from building up to unacceptable damaging levels. If preventive tactics are determined or projected to be inadequate, then a rescue tactic is applied. There are a number of constraints on adoption of IPM by growers. The growth in farm size has put a premium on efficiency, whereas IPM can demand extra effort and ...


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.


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.


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.


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.


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.


Lunasin And Bowman-Birk Protease Inhibitor Concentrations Of Protein Extracts From Enzyme-Assisted Aqueous Extraction Of Soybeans, Juliana Maria L. Nobrega De Moura, Blanca Hernandez-Ledesma, Neiva M. De Almeida, Chia-Chien Hsieh, Ben O. De Lumen, Lawrence A. Johnson May 2011

Lunasin And Bowman-Birk Protease Inhibitor Concentrations Of Protein Extracts From Enzyme-Assisted Aqueous Extraction Of Soybeans, Juliana Maria L. Nobrega De Moura, Blanca Hernandez-Ledesma, Neiva M. De Almeida, Chia-Chien Hsieh, Ben O. De Lumen, Lawrence A. Johnson

Food Science and Human Nutrition Publications

Lunasin and Bowman-Birk protease inhibitor (BBI) are two soybean peptides to which health-promoting properties have been attributed. Concentrations of these peptides were determined in skim fractions produced by enzyme-assisted aqueous extraction processing (EAEP) of extruded full-fat soybean flakes (an alternative to extracting oil from soybeans with hexane) and compared with similar extracts from hexane-defatted soybean meal. Oil and protein were extracted by using countercurrent twostage EAEP of soybeans at 1:6 solids-to-liquid ratio, 50C, pH 9.0, and 120 rpm for 1 h. Protein-rich skim fractions were produced from extruded full-fat soybean flakes using different enzyme strategies in EAEP: 0 ...


Oil Composition Of Low-Phytate Soybean Lines Containing Genes For Reduced Palmitate And Linolenate Concentrations, John Gill Jan 2011

Oil Composition Of Low-Phytate Soybean Lines Containing Genes For Reduced Palmitate And Linolenate Concentrations, John Gill

Graduate Theses and Dissertations

Soybean [Glycine max (L.) Merr.] grain with reduced phytate, myo-inositol-1,2,3,4,5,6-hexakisphosphate, and increased inorganic phosphorus (Pi) would be useful for feeding soybean meal to monogastric animals, such as swine and poultry. A low-phytate (LP) soybean meal would increase the availability of phosphorus (P) in their ration (Adeola et al., 2005; Erdman, 1979; Powers et al., 2006; Richert et al., 2009), reduce the cost of supplemental P and synthetic phytase (Cromwell, 2002), and reduce the Pi in their excrement, which could have positive benefits for the environment (Daverede et al., 2004).

The study by Hulke et al ...


Earlier Harvest And Drying Of Soybean Seed Within Intact Pods Maintains Seed Quality, Ross David Ennen Jan 2011

Earlier Harvest And Drying Of Soybean Seed Within Intact Pods Maintains Seed Quality, Ross David Ennen

Graduate Theses and Dissertations

Soybean [Glycine max (L.) Merr.] seed quality (viability and vigor) is critical to seed producers, emphasizing the need to maximize the quality of the harvested seeds. Currently, soybean seeds are harvested at a moisture content of ≤ 160 g kg-1, similar to the moisture content of harvested soybean grain. However, soybean seed quality peaks at physiological maturity (PM). Allowing soybean seeds to desiccate in the field increases vulnerability to seed deterioration, disease, and harvest losses. Early harvest of soybean seeds and drying within intact pods might maintain seed quality. Our research examined the effect of maturity stage (green-, yellow-, or ...


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.


Coupling Soybean Cyst Nematode Damage To Cropgro-Soybean, J. Fallick, W. D. Batchelor, G. L. Tylka, T. L. Niblack, J. O. Paz Jan 2002

Coupling Soybean Cyst Nematode Damage To Cropgro-Soybean, J. Fallick, W. D. Batchelor, G. L. Tylka, T. L. Niblack, J. O. Paz

Plant Pathology and Microbiology Publications

The soybean cyst nematode (SCN) Heterodera glycines Ichinohe is responsible for substantial economic losses in soybean (Glycine max L. Merr.) production throughout the U.S. Results from past efforts to quantify the severity of crop damage resulting from SCN are often subject to variable experimental conditions resulting from differences in weather, soil type, and cultivar. Because of the difficulty in accounting for these variables, a process–oriented crop growth simulation model was chosen as a platform for studying the dynamics of SCN damage and for transferring knowledge between crop production scenarios. The objective of this study was to develop and ...


Incorporation Of A Subsurface Tile Drainage Component Into A Soybean Growth Model, Jinmei Shen, William D. Batchelor, Rameshwar S. Kanwar, James W. Jones, Joe T. Ritchie, Carl W. Mize Jan 1998

Incorporation Of A Subsurface Tile Drainage Component Into A Soybean Growth Model, Jinmei Shen, William D. Batchelor, Rameshwar S. Kanwar, James W. Jones, Joe T. Ritchie, Carl W. Mize

Agricultural and Biosystems Engineering Publications

A simple tile drainage model was incorporated into a recent version of the CROPGRO-soybean model. The model was calibrated and validated using four years of data from the Water Quality Research site, located at the Iowa State University Northeast-Research Center near Nashua, Iowa having two soil types (Readlyn and Kenyon). The data consisted of measurements of soil water contents at different depths and times, cumulative monthly tile flow, and final crop yield from 36 different 0.41 ha plots that were individually tile drained. The model was calibrated to give the best fit between the predicted and measured tile flow ...