tillage, no-till, nitrogen placement, corn, wheat, soybean
In 2016, adding nitrogen (N) greatly improved average wheat yields, but the response to tillage and different N placement methods was minimal. Double-crop soybean yields were unaffected by tillage or the residual from N treatments that were applied to the previous wheat crop.
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Sweeney, D. W.
"Tillage and Nitrogen Placement Effects on Yields in a Short-Season Corn/Wheat/ Double-Crop Soybean Rotation,"
Kansas Agricultural Experiment Station Research Reports: