Quantifying Corn N Deficiency and Application Rate with Active Canopy Sensors

Quantifying Corn N Deficiency and Application Rate with Active Canopy Sensors

Daniel W. Barker, Iowa State University
John E. Sawyer, Iowa State University

This poster is from Iowa State University University Extension (2010). Posted with permission.

Description

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.