Assessment of In‐Season Soil Nitrogen Tests for Corn Planted into Winter Annual Cover Crops

Core Ideas The Solvita 1‐d CO 2 mineralization test could be a new tool to improve in‐season N rate recommendations for corn. Solvita and soil NO 3 –N tests may be useful for predicting the level of early‐season N mineralization from winter cover crops (WCCs). Soil NO 3 –N collected at the V4 growth stage of corn at 0 to 15 cm was positively correlated ( R 2 = 0.45) with corn check yield. Neither the Solvita nor the presidedress nitrate test...