1. Agronomy Dep.; Univ. of Florida; Gainesville FL 32611-0500
2. Range Cattle Research and Education Center; Ona FL 33865
3. Dep. of Animal Sciences, 303A Upchurch Hall; Auburn University; Alabama AL 36849
4. Embrapa Gado de Leite; Juiz de Fora MG Brazil
5. São Paulo State Univ.; Jaboticabal São Paulo Brazil 14884-900
6. North Florida Research and Education Center; Marianna FL 32446