Seasonal and Rotational Influences
on Corn Nitrogen Fertilization in Southwest Iowa

John E. Sawyer; Daniel Barker

Armstrong Memorial Research and Demonstration Farm

Seasonal and Rotational Influences on Corn Nitrogen Fertilization in Southwest Iowa

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

Abstract

This project was designed to study the nitrogen (N) fertilization needs in continuous corn (CC) and corn rotated with soybean (CS) as influenced by location and climate. Multiple rates of fertilizer N were spring applied, with the intent to measure yield response to N within each rotation on a yearly basis for multiple years at multiple sites across Iowa. This will allow determination of N requirements for each rotation, differences that exist between the two rotations, responses to applied N across different soils and climatic conditions, and evaluation of tools used to adjust N application.

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How to Cite: Sawyer, J. E. & Barker, D. (2017) “Seasonal and Rotational Influences on Corn Nitrogen Fertilization in Southwest Iowa”, Iowa State University Research and Demonstration Farms Progress Reports. 2016(1).