1. USDA–ARS Forage Seed and Cereal Research Unit 24106 N. Bunn Rd. Prosser WA 99350 USA
2. The Land Institute 2440 E Water Well Rd. Salina KS 67401 USA
3. Dep. of Agronomy and Plant Genetics Univ. of Minnesota 1991 Upper Buford Circle St. Paul MN 55108 USA