Campus Units

Agronomy

Document Type

Conference Proceeding

Publication Version

Published Version

Publication Date

2006

Journal or Book Title

Proceedings of the Thirty-Sixth North Central Extension-Industry Soil Fertility Conference

Volume

22

First Page

86

Last Page

93

Conference Title

Thirty-Sixth North Central Extension-Industry Soil Fertility Conference

Conference Date

November 7-8, 2006

City

Des Moines, IA

Abstract

Data from 96 locations across the North Central Region was complied to evaluate the usefulness of the Illinois soil nitrogen test (ISNT) in identifying fields where corn will not respond to additional N fertilizer and predicting the yield optimizing N rate (YONR) for each field. The ISNT could not accurately predict non-responsive sites, nor could it predict YONR. Sub-setting the data based on soil drainage class and previous crop did not improve the predictive capability of the ISNT. The ISNT was related to soil organic matter and was measuring a constant fraction of total soil N. The ISNT is not a meaningful tool upon which N rate decisions should be based.

Comments

This is a proceeding from Thirty-Sixth North Central Extension-Industry Soil Fertility Conference 22 (2006): 86. Posted with permission.

Copyright Owner

Potash & Phosphate Institute

Language

en

File Format

application/pdf

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Article Location

 
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