The author has identified the following significant results. The Great Plains Corridor
rangeland project successfully utilized natural vegetation systems as phenological
indicators of seasonal development and climatic effects upon regional growth conditions. An
effective method was developed for quantitative measurement of vegetation conditions,
including green biomass estimates, recorded in bands 5 and 6, corrected for sun angle,
were used to compute a ratio parameter (TV16) which is shown to be highly correlated with …

This regional study monitors the vernal advancement and retrogradation of natural
vegetation (green wave effec using ERTS observations throughout the Great Plains
Corridor. The green wave effect is charted by using the relatively homogeneous rangeland
vegetation systems of the Mixed Prairie region in the central United States as phenological
indicators. ERTS multispectral scanner data and ground observations collected from the
network of ten test sites are used to measure vegetation changes during the life-time of …