Purdue Agronomy Farm Winter Wheat (791806)
The purpose of this experiment is to investigate the effects of disease
and nitrogen fertilization on the spectral and agronomic
characteristics of winter wheat. There were three nitrogen fertilizer
rates (0, 46, and 92 kg/hectare), and three disease treatments
(resistant cultivar, susceptible cultivar, and susceptible treated with
fungicide) with three replications in a randomized complete block
design. Measurements of reflectance and radiant temperature of the
wheat canopies were made with the Exotech 20C spectroradiometer
system and the Exotech 100 Landsat band radiometer system at
approximately weekly intervals from tillering through ripe stages of
development. Agronomic characterizations of the canopies included:
leaf area index, biomass, percent soil cover, height, lodging, disease
severity, leaf nitrogen concentration, and grain yield.