1. Dep. of Agronomy & Resource Sciences; Texas A&M Univ.-Kingsville, MSC 228; Kingsville TX 78363
2. Dep. of Plant Sciences; Univ. of California-Davis; 1636 E. Alisal St. Salinas CA 93905
3. USDA-ARS, Water Management Research Unit; Fort Collins CO 80526-8119
4. Dep. of Soil and Crop Sciences; Colorado State Univ.; C127 Plant Sciences Bldg. Ft. Collins CO 80523
5. USDA-ARS, U.S. Salinity Lab.; Riverside CA 92507