Abstract
Nitrogen recommendations based on yield goals require reliable estimates of the factors affecting corn (Zea mays L.) N needs. If these parameters are unknown or erroneously estimated, N recommendations may be inappropriate from economic and environmental perspectives. This study was conducted to develop corn N recommendations using soil-specific data from 117 corn N response experiments and to compare these recommendations with those based on yield goals. Soil-specific recommendations for six major soil regions in Wisconsin were developed using a response function based on combined data from all experiments conducted on a specific soil, and from response surface models containing N rate and residual nitrate-N variables [...]
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