Abstract
Following winter wheat, there can be approximately a 90‐day fallow period with no crop N uptake and autumn soil temperatures >50°F, leading to increased residual soil NO3–N availability. Opportunities exist for incorporation of cover crops to assimilate residual autumn soil N and reduce the potential for N loss. The objective of this study was to quantify daikon radish and forage oat cover crop biomass and N uptake, cover crop impact on soil NO3–N concentration, and corn growth, grain yield, and profitability responses to N placement and timing combinations following cover crops. Earn 1 CEU in Nutrient Management by reading this article and taking the quiz at www.certifiedcropadviser.org/education/classroom/classes/699.
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