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1. Tillage and Nitrogen Rates Influenced Wheat and Sorghum ProductivityReduced tillage (RT) or no-tillage (NT) practices and reducing fallow frequency can both decrease soil losses from wind erosion and conserve soil water in the semiarid regions of the US Great Plains. This study evaluated sorghum grain yield in 2013 and wheat grain yield in 2014 and 2015 as influenced by long-term nitrogen (N) fertilizer application rates (0, 20, 40, and 60 lb N ac- 1) and tillage intensity [clean tillage (CT), RT, and NT] in dryland winter wheat–sorghum-fallow (W-S-F) cropping... M. Mikha |
2. Seeding Rate and Planting Configuration Affect the Interspecific Function of a Wheat-pea Cover CropCover crop species mixtures have potential to maximize overall biomass as well as net N contribution if temporary immobilization of available N by non-legume species can promote greater N fixation by legumes. The growth and ultimate function of legumes in cover crop species mixtures is often limited, however, by excessive competition with other species, particularly grasses, in the mix. The objective of this work is to identify optimum cool-season legume-grass cover... N. Nielsen, T. Hussain, R. Matschek, R. Noland, M. Mcculloch |