Seasonal and Rotational Influences on Corn Nitrogen Fertilization in South Central Iowa

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2017-01-01
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Barker, Daniel
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Sawyer, John
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Barker, Daniel
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Extension and Experiment Station PublicationsAgronomy
Abstract

This project was designed to study the 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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