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Full-Text Articles in Life Sciences
Winter Grazing Management, Stephen K. Barnhart, James R. Russell, Douglas L. Karlen, Michael J. Tidman
Winter Grazing Management, Stephen K. Barnhart, James R. Russell, Douglas L. Karlen, Michael J. Tidman
Douglas L Karlen
Why winter grazing? Beef cow herd and sheep flock records show that winter feeding costs are livestock producers' single largest production expense. Managing through winter weather while keeping feeding costs low is an essential part of maintaining a profitable operation. Iowa's climate generally allows forage growth only during a 7-to-8 month period. Extending the grazing of this forage--even an extra 3 or 4 weeks in late autumn and winter--is an economical way to maintain or increase livestock profitability. Some producers extend the grazing season by using stockpiled forage, whereas others use crop residue, and many combine the use of stockpiled …
Drought Effects On Composition And Yield For Corn Stover, Mixed Grasses, And Miscanthus As Bioenergy Feedstocks, Rachel Emerson, Amber Hoover, Allison Ray, Jeffrey Lacey, Marnie Cortez, Courtney Payne, Douglas L. Karlen, Stuart J. Birrell, David A. Laird, Robert Kallenbach, Josh Egenolf, Matthew Sousek, Thomas Voigt
Drought Effects On Composition And Yield For Corn Stover, Mixed Grasses, And Miscanthus As Bioenergy Feedstocks, Rachel Emerson, Amber Hoover, Allison Ray, Jeffrey Lacey, Marnie Cortez, Courtney Payne, Douglas L. Karlen, Stuart J. Birrell, David A. Laird, Robert Kallenbach, Josh Egenolf, Matthew Sousek, Thomas Voigt
Douglas L Karlen
Drought conditions in 2012 were some of the most severe in recent history. The purpose of this study is to examine the impact of drought on quality, quantity, and theoretical ethanol yield (TEY) of three bioenergy feedstocks, corn stover, mixed grasses from Conservation Reserve Program lands, and Miscanthus ×giganteus. To assess drought effects on these feedstocks, samples from 2010 (minimal to no drought) and 2012 (severe drought) were compared from multiple locations in the US. In all feedstocks, drought significantly increased extractives and reduced structural sugars and lignin; subsequently, TEYs were reduced 10–15%. Biomass yields were significantly reduced …
Nitrogen Management Of Winter Triticale, Lance R. Gibson, Carasella Nance, Douglas L. Karlen
Nitrogen Management Of Winter Triticale, Lance R. Gibson, Carasella Nance, Douglas L. Karlen
Douglas L Karlen
Triticale (trit-ah-kay-lee) is a close relative of wheat. When durum wheat is pollinated with rye pollen, the cross is used in a breeding program to produce stable, self-replicating varieties. Triticale yield, stress tolerance, and disease resistance are typically greater than similar traits found in wheat. Triticale does not currently possess the grain traits of bread wheat, so its greatest market potential is as animal feed.
Potential Economic, Environmental Benefits Of Narrow Strip Intercropping, Richard M. Cruse, Douglas Karlen, Kenneth J. Moore
Potential Economic, Environmental Benefits Of Narrow Strip Intercropping, Richard M. Cruse, Douglas Karlen, Kenneth J. Moore
Douglas L Karlen
Since its establishment in 1989, the Cropping Systems interdisciplinary research issue team has worked to develop a cropping system that is more environmentally sustainable than cur rent cropping approaches but just as favorable economically. The team's work to date has focused on the strip intercropping concept.
Planting Date Effects On Wintertriticale Grain And Forage Yield, Lance R. Gibson, Aaron J. Schwarte, David N. Sundberg, Douglas L. Karlen
Planting Date Effects On Wintertriticale Grain And Forage Yield, Lance R. Gibson, Aaron J. Schwarte, David N. Sundberg, Douglas L. Karlen
Douglas L Karlen
Triticale (trit-ah-kay-lee) is a close relative of wheat. When durum wheat is pollinated with rye pollen, the cross is used in a breeding program to produce these stable, self-replicating varieties. Triticale yield, stress tolerance, and disease resistance are typically greater than similar traits found in wheat. Triticale doesn’t currently possess the grain traits of bread wheat, so its greatest market potential is as animal feed.
Planting Date Effects On Winter Triticale Grain Yield, Lance R. Gibson, Aaron J. Schwarte, David N. Sundberg, Douglas L. Karlen
Planting Date Effects On Winter Triticale Grain Yield, Lance R. Gibson, Aaron J. Schwarte, David N. Sundberg, Douglas L. Karlen
Douglas L Karlen
Triticale (trit-ah-kay-lee) is a close relative of wheat resulting from pollinating durum wheat with rye pollen and using the cross in a breeding program to produce stable, self-replicating varieties. Yield, stress tolerance, and disease resistance are typically greater in triticale than in wheat. Triticale doesn’t currently possess the grain traits of bread wheat, so its greatest market potential is as animal feed.
Soil Quality, Yield Stability And Economic Attributes Of Alternative Crop Rotations, Douglas L. Karlen, Cynthia A. Cambardella, Antonio P. Mallarino
Soil Quality, Yield Stability And Economic Attributes Of Alternative Crop Rotations, Douglas L. Karlen, Cynthia A. Cambardella, Antonio P. Mallarino
Douglas L Karlen
Three long-term rotational crop studies in Iowa and one in Wisconsin were examined for conclusive evidence of rotational effects on soil quality. Long-term yield data also were evaluated to determine if there was a quantifiable relationship between soil quality and yield or yield stability.