1. Univ. of Arkansas Cooperative Extension Service Washington County Office Fayetteville AR 72701
2. USDA‐ARS U.S. Dairy Forage Research Ctr. Marshfield WI 54449
3. Dep. of Animal Sci. Univ. of Arkansas Fayetteville AR 7270
4. Dep. of Crop, Soil, and Environmental Sci. Univ. of Arkansas Fayetteville AR 72701
5. Livestock and Forestry Branch Station Batesville AR 72501
6. Arkansas Agric. Res. and Ext. Ctr. Fayetteville AR
7. USDA‐ARS Woodward OK 73801