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Normalized Difference Vegetation Index and Soil Color-Based Management Zones in Irrigated Maize

^a Dep. of Soil & Crop Sciences, Plant Science Bldg., Colorado State Univ., Fort Collins, CO 80523-1170
^b Dep. of Forest, Rangeland and Watershed Stewardship, Colorado State Univ., Fort Collins, CO 80523-1170

View larger version (31K): [in this window] [in a new window]   Fig. 1. Mean normalized difference vegetation index (NDVI) at crop growth stage V8, among management zones for all site years. Within a site-year bars with different letters are significantly different at P 0.05 level of significance. Site years are designated by roman numerals in the upper right-hand portion of each chart.

View larger version (35K): [in this window] [in a new window]   Fig. 2. Mean grain yield among management zones for all site-years. Within a site-year bars with different letters are significantly different at P 0.05 level of significance. Site years are designated by roman numerals in the upper right-hand portion of each chart.

View larger version (27K): [in this window] [in a new window]   Fig. 3. Scatter plots of normalized difference vegetation index (NDVI) at crop growth stage V8, vs. relative yield for site years (SY) I through VI.