Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: FIELD-SCALE EVALUATION OF INNOVATIVE N MANAGEMENT SYSTEMS FOR CORN)

Author
item Scharf, P
item Kitchen, Newell
item Davis, J
item Sudduth, Kenneth - Ken
item Lory, J

Submitted to: Agronomy Abstracts
Publication Type: Abstract only
Publication Acceptance Date: 11/9/2000
Publication Date: N/A
Citation:

Interpretive Summary:

Technical Abstract: Previous research has shown that N fertilizer need for corn can vary widely, both between fields and within fields. However, producers almost always apply the same N fertilizer rate to whole fields, and vary N fertilizer rates minimally if at all over whole farms. Matching N fertilizer rates more closely to N needs could produce both economic and environmental benefits. Our objective is to test a range of innovative N management systems for their ability to match N rate recommendations to N needs at a field scale. We conducted experiments at 3 locations in 1999 and 3 locations in 2000. Systems evaluated include current Missouri recommendations, preplant and sidedress soil tests, variable yield goal based on soil electrical conductivity, and sidedress N rates based on corn color measured in either aerial photographs or with a ground-based spectral radiometer. Optimum N fertilizer rate varied widely in some fields (range > 100 kg N/ha) and much less in others. Systems will be evaluated based o both economic and environmental performance.

Last Modified: 8/24/2016
Footer Content Back to Top of Page