In general, conventional tillage averaged nearly 40 bu/acre greater corn yield than no-till likely because of improved growth during the season. With conventional tillage, all side-dress treatments resulted in greater yield than with all N applied pre-plant. However, in lower-yielding no-till systems, the yield response to side-dress applications appeared to be greater for V10 applications compared with those at V6.
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Sweeney, D. W. and Shoup, D. E.
"Timing of Side-Dress Applications of N for Corn in Conventional and No-Till Systems,"
Kansas Agricultural Experiment Station Research Reports: