1. Center Director, Water Management and Conservation Research Unit, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85238 (corresponding author).
2. Electrical Engineer, Water Management and Conservation Research Unit, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85238.
3. Water Management and Conservation Research Unit, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85238.