Corn Yield Response to Nitrogen Fertilizer
Application Timing in Southwest Iowa

John Lundvall; Dan Barker; John E. Sawyer

Armstrong Memorial Research and Demonstration Farm

Corn Yield Response to Nitrogen Fertilizer Application Timing in Southwest Iowa

Authors: John Lundvall (Iowa State University) , Dan Barker (Iowa State University) , John E. Sawyer (Iowa State University)

Abstract

The objective of this project was to measure corn yield response to fertilizer nitrogen (N) application timing (spring pre-plant or at-planting vs. split/side-dress) across multiple N rates (0 to 250 lb total-N/acre). Results were determined through fitting yield response to N-rate regression equations and calculation of economic optimum nitrogen rate (EONR) based on a 0.10 N fertilizer price-to-corn price ratio.

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How to Cite: Lundvall, J. , Barker, D. & Sawyer, J. E. (2017) “Corn Yield Response to Nitrogen Fertilizer Application Timing in Southwest Iowa”, Iowa State University Research and Demonstration Farms Progress Reports. 2016(1).