1. Dep. of Agronomy, 1575 Linden Dr.; Univ. of Wisconsin; Madison WI 53706-1597
2. USDA-ARS Plant Science Res. Unit and US Dairy Forage Res. Ctr. Cluster, Dep. of Agronomy and Plant Genetics, 411 Borlaug Hall, 1991 Upper Buford Cir.; Univ. of Minnesota; St. Paul MN 55108