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Article
Quantifying Corn N Deficiency with Active Canopy Sensors
Proceedings of the 2012 Wisconsin Crop Management Conference
  • John E. Sawyer, Iowa State University
  • Daniel W. Barker, Iowa State University
Document Type
Conference Proceeding
Publication Version
Published Version
Publication Date
1-1-2012
Conference Title
2012 Wisconsin Crop Management Conference
Conference Date
January 10-12, 2012
Geolocation
(43.0730517, -89.40123019999999)
Abstract
Precision agriculture technologies are an integral part of many crop production operations. However, implementation for N application has lagged, primarily due to lack of a viable system for variable N rate decisions. Active canopy sensors have been developed as a tool to determine plant N stress deficiency and provide an on-the-go decision for implementing variable rate. There are two general approaches. One is to conduct canopy sensing each year, with a reduced N rate applied preplant, at planting, or early sidedress and then sensing at mid-vegetative growth to determine additional application need. A second is to conduct sensing only if conditions result in N loss from the primary N application, or other factors change expected crop requirements. Both approaches could address variable N fertilization and seasonal conditions.
Comments

This is a proceeding from Wisconsin Crop Management Conference 51 (2012): 65. Posted with permission.

Copyright Owner
The Authors
Language
en
File Format
application/pdf
Citation Information
John E. Sawyer and Daniel W. Barker. "Quantifying Corn N Deficiency with Active Canopy Sensors" Madison, WisconsinProceedings of the 2012 Wisconsin Crop Management Conference Vol. 51 (2012) p. 65 - 74
Available at: http://works.bepress.com/john-sawyer/349/