Abstract

MSS and TM band reflectance calculations of soybean and corn were made using a row crop reflectance model. Crop geometries representing conditions at two different times during the growing season—mid-July and mid-August—were used in order to compare the soybean-corn discrimination potential of MSS bands and TM bands at these two times. The model results confirm experimental evidence that the TM bands can be used for soybean-corn discrimination earlier in the season than can the MSS bands. The reflectance model results suggest that the sensitivity of the TM mid-IR bands to exposed soil between rows of the early soybean canopy is responsible for the early discrimination capability.

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