Research during the past decade has raised many questions concerning how farmers should estimate nitrogen (N) fertilizer needs for corn after soybean. In 2001, a group of farmers worked together to estimate the yield losses associated with reducing rates of spring-applied N to 50 lb/acre below those usually recommended.
Iowa State University
Blackmer, Alfred M. and Van De Woestyne, Bradley Wilbert, "Corn yields at reduced rates of spring nitrogen in 2001" (2002). Integrated Crop Management News. 1795.
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