1. USDA-ARS, U.S. Dairy Forage Research Center; 8396 Yellowstone Dr. Marshfield WI 54449
2. USDA-ARS, U.S. Dairy Forage Research Center; Madison WI 53706
3. Dep. of Agronomy; University of Wisconsin; Madison WI 53706
4. Mention of trade names or commercial products is solely for the purpose of providing specific information about scientific procedures and/or subsequent evaluation of results, and does not imply any recommendation or endorsement by the USDA