1. USDA-ARS, NPA, Crop Research Lab.; 1701 Centre Dr. Fort Collins CO 80526
2. Dep. of Plant Sciences, Univ. of California; Davis CA 95616-8780
3. USDA-ARS, Crop Improvement and Protection Research Unit; 1636 E. Alisal St. Salinas CA 93905
4. USDA-ARS, Sugarbeet and Bean Research Unit, Dep. of Plant, Soil, and Microbial Sciences; Michigan State Univ.; 494 Plant & Soil Sci. Bldg., 1066 Bogue St. East Lansing MI 48824-1325
5. Minn-Dak Farmer's Cooperative; 7525 Red River Rd. Wahpeton ND 58075
6. USDA-ARS, Northwest Irrigation and Soils Research Lab.; 3793 North 3600 East Kimberly ID 83341-5076