1. Univ. of Florida, North Florida Research and Education Center‐Marianna 3925 Highway 71 Marianna FL 32446 USA
2. Current address, USDA‐ARS Pasture Systems and Watershed Management Research Unit 3702 Curtin Road University Park PA 16802 USA
3. Agronomy Dep. Univ. of Florida 3111 McCarty Hall B Gainesville FL 32611 USA
4. Univ. of Florida, North Florida Research and Education Center‐Quincy 155 Research Rd. Quincy FL 32351 USA
5. Univ. of Florida, Range Cattle Research and Education Center 3401 Experiment Station Ona FL 33865 USA
6. Univ. of Florida, Agronomy Dep. and IFAS Statistical Consulting Unit 404 McCarty Hall C Gainesville FL 32611 USA