1. Dep. of Plant, Soil and Microbial Sciences; Michigan State Univ.; 1066 Bogue St. East Lansing MI 48824
2. USDA-ARS; Forage and Vegetable Crop Research Unit; 24106 North Bunn Rd. Prosser WA 99350
3. USDA-ARS and Dep. of Plant, Soil and Microbial Sciences; Michigan State Univ.; East Lansing MI 48824