STS073-744-060 Imperial Valley, California, U.S.A., and U.S.-Mexico Border October 1995 This photograph, with vegetation recorded as reds on the color infrared film, features the cultivated, irrigated field patterns at the southern end of the Imperial Valley. The landscapes of the United States and Mexico delineate the differences in agricultural management practices--patterns south of the border become smaller and more irregular. The general outline of Mexicali, surrounded by agricultural field patterns, is discernible immediately south of the border.