1. USDA-ARS; 9611 S. Riverbend Ave. Parlier CA 93648
2. Univ. of California-Davis; 1636 E. Alisal St. Salinas CA 93905
3. Dep. of Renewable Resources; Univ. of Wyoming; P.O. Box 3354 Laramie WY 82071
4. Dep. of Crop and Soil Environmental Sciences; Virginia Polytechnic Institute and State Univ.; 246 Smyth Hall Blacksburg VA 24061
5. Faculty of Agriculture, Food and Natural Resources; Univ. of Sydney; 107 Cobbitty Rd. Cobbity NSW 2570 Australia
6. USDA-ARS; Sustainable Agricultural Systems Lab.; Beltsville MD 20705