High rainfall in some areas the past couple of weeks has produced another wet spring in Iowa. This leads to questions about nitrogen (N) loss and need for supplemental N application to corn. Unfortunately, this question has become almost the norm - I have written approximately 20 articles on the subject since 2007.
Iowa State University
Sawyer, John E., "Potential Nitrogen Loss - 2018" (2018). Integrated Crop Management News. 2489.
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