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Airborne Remote Sensing Used To Estimate Percent Canopy Cover, And To Extract Canopy Temperature From Scene Temperature In Cotton, William R. Detar, J. V. Penner
Airborne Remote Sensing Used To Estimate Percent Canopy Cover, And To Extract Canopy Temperature From Scene Temperature In Cotton, William R. Detar, J. V. Penner
William R DeTar
The goal of this research was to separate the soil and plant temperatures and create an image map of plant water stress. Data from hyperspectral imagery (HSI) and thermal infrared (TIR) sensors were collected using an airborne platform over three seasons, involving three different varieties of Acala cotton, four different fields, and a total of ten flights. The first step was to measure the percent canopy cover, which ranged from 30% to 100%. Using linear multiple regression, percent canopy cover, measured manually in the field, was found to be closely related to several new vegetation indices, taken from among 60 …
Drip System Used To Measure Water Use By Cowpea (Vigna Unguiculata), William R. Detar, Howard A. Funk, Blake M. Sanden
Drip System Used To Measure Water Use By Cowpea (Vigna Unguiculata), William R. Detar, Howard A. Funk, Blake M. Sanden
William R DeTar
Water use was calculated by multiplying a crop coefficient by a reference evapotranspiration (ET). We used evaporation from a USDA Class A evaporation pan as a reference ET, and we also used the more standard CIMIS (California Irrigation Management Information System) value of ETo, which is available on-line. World-wide, a more common reference ET is the Penman-Monteith equation.