Quantifying Corn N Deficiency and Application Rate with Active Canopy Sensors

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2010-01-01
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Barker, Daniel
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Sawyer, John
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Agronomy
Abstract

Precision agriculture technologies are an integral part of many operations in Iowa corn production. Active canopy sensors have been developed as a tool to determine plant N stress deficiency and provide on-the-go decisions for implementing variable rate N application. The objectives of this study were to assess N deficiency stress levels at the mid-vegetative corn growth stages with active canopy sensors, calibrate active sensors and associated canopy indices, and develop N rate algorithms that can be used to determine variable rate N fertilization.

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Fri Jan 01 00:00:00 UTC 2010