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Issue 3: Research and Applications

Managing Protein in Spring Wheat with Aerial and Satellite Imagery

Dennis L. Wright Jr., Glen Ritchie, V. Philip Rasmussen,
R. Douglas Ramsey, and Doran Baker

Abstract | Full Paper (PDF, 1.3 MB)

Nitrogen fertilizer application can help wheat growers increase crop value and marketability by increasing grain quality. Nitrogen (N) is often applied at heading as a method of increasing protein content and therefore quality of wheat. Our objectives were to obtain spectral signatures of wheat under various N rates (0, 72, 180, 234 kg N ha-1), test various spectral methods of identifying crop stress, and observe the grain protein response to a midseason N application. Spectral data from satellite and aerial platforms were compared to preseason N treatments and flag-leaf tissue samples. Spectral data correlated well with preseason and flag leaf tissue analysis (r2 = 0.58-0.82). Grain protein increased on plots that received an additional 54 kg of N ha-1 at anthesis almost 2% in the N stressed plots (72 kg N ha-1) and 0.3-0.4% on plots with sufficient N (234 and 180 kg N ha-1). Wheat stress detected and managed with help from satellite and aerial platforms could help growers increase revenue and decrease N over-application.

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Issue No. 3:
Remote Sensing of Earth
via Satellite

Winter 2003

General Editor Introduction

From the Guest Editors

Introduction to Remote Sensing

A Tutorial:
p. 1
, p. 2

Science for Society:
p. 1
, p. 2, p. 3

AmericaView Consortium

Remote Sensing Satellites:
p. 1
, p. 2

Online Resources

Research and Applications

Critical Perspectives

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