The goal of this study was to develop and verify methods to use Landsat data for mapping and quantifying the productivity of soil areas on which the annual yields of spring wheat exposed to the same weather conditions are generally different.

The study was done in two parts. First, a calibration study was done to determine which features visible on Landsat imagery were associated with different relative productivities. Then, in a two-part accuracy verification study, Uniform Productivity Area (UPA) boundaries were drawn on three ma sheets 1:250,000 Canadian National Topographic System) and the relative productivity of each UPA within 25 townships in the Canadian Prairies were estimated. The boundaries were compared with known soil productivity area boundaries and the relative productivity ratings were compared with reported yields.

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