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1. Evaluating the Trade-offs of Cover Crops in Dryland Wheat Systems of the Colorado PlateauOn the semi-arid Colorado Plateau, dryland farmers are challenged by severely degraded soils and low and increasingly unreliable precipitation. Cover crops have been shown to improve soil fertility and mitigate soil erosion in many regions, but are also associated with use of limited soil moisture, a cost that could mean decreased cash crop productivity for farmers. Most literature on cover crops comes from relatively humid climates, where crop yield penalties due to cover crops may be less pronounced.... L. Eash, A. Berrada, K. Russell, S. Fonte |
2. Post-Wheat Summer Cover Crop Effects Crop Yields and Soil Properties in a No-till Dryland Cropping SystemTraditional dryland cropping systems in the semi-arid Great Plains include long fallow periods of up to 14 months to conserve soil moisture. However, such systems are inefficient even under continuous no-till (NT) management. As less water is necessary to produce forage compared to grain, cover crops (CCs) may be successfully integrated into dryland crop rotations for increased soil cover and potentially greater income when hayed or grazed as annual forages. One study was initiated in 2016 near... L.M. Simon, A.K. Obour, J.D. Holman, M.E. Schipanski, S.K. Johnson, K.L. Roozeboom |