Radiometric reflectance measurements of northern Great Plains rangeland and crested wheatgrass pastures
1987
Aase, J.K. | Frank, A.B. | Lorenz, R.J.
Calculated reflectance factors and vegetation indices derived from radiometric reflectance measurements were used in regression analyses to test for a single relationship between canopy reflectance characteristics and measured vegetation parameters from 1 moderately grazed and 1 heavily grazed native rangeland pasture and 1 Agropyron desertorum pasture. The study was located on a Williams loam near Mandan, North Dakota. Reflectance measurements were made near solar noon once a week during the 1983 and 1984 growing seasons. There was a statistically significant relationship between LAI and green DM yield among pastures and years. Each pasture exhibited a unique relationship between vegetation indices developed from the reflectance measurements and LAI or green DM. Based on the techniques and wavebands used in this study, over a given geographic region and with pasture management practices known, it may be possible to estimate green DM using remote sensing.
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