Develop and conduct an applied research program to solve problems of commercial growers in the low desert region of the southwestern United States. Also develop and conduct extension support program to complement research program. Research may include plant nutrient utilization, soil and water management, salinity, and fate and transport of agriculturally derived chemicals and environmental toxins. This program should complement other research activities at the University and also be responsive to the needs of commodity groups, associated governmental agencies, and commercial and industrial interests. Cooperative research and outreach programs should be coordinated with research and extension faculty throughout Arizona and the lower Colorado River area including California’s Imperial and Coachella Valleys.