Journal or Book Title
Proceedings of the 46th North Central Extension-Industry Soil Fertility Conference
46th North Central Extension-Industry Soil Fertility Conference
November 2-3, 2016
Des Moines, IA
Water quality issues have renewed interest in timing of nitrogen (N) application as a means to improve use efficiency in corn and reduce losses. Improved economic return is also desired as N fertilization is one of the most costly inputs to corn production. Time of fertilizer application is a component of the site-specific 4R nutrient management stewardship programs. In Iowa, the Nutrient Reduction Strategy has a 7% (37% std. dev.) nitrate-N reduction with a 0% (3% std. dev.) corn yield change for sidedress compared to pre-plant N application (SP 0435A).
International Plant Nutrition Institute
Sawyer, John E.; Barker, Daniel W.; and Lundvall, John P., "Impact of nitrogen application timing on corn production" (2016). Agronomy Conference Proceedings and Presentations. 61.