1. USDA-ARS, U.S. Salinity Lab.; 450 W. Big Springs Rd. Riverside CA 92507
2. USDA-ARS, Environmental Management & Byproduct Utilization Lab.; Beltsville MD
3. USDA-ARS, North Central Agricultural Research Lab.; Brookings SD
4. USDA-ARS, San Joaquin Valley Agricultural Sciences Center; Parlier CA
5. USDA-ARS, National Lab. for Agriculture and the Environment; Ames IA