1. Agronomy Department University of Florida Gainesville FL 32611 USA
2. West Florida Research and Education Center University of Florida Jay FL 32565 USA
3. Crop and Soil Sciences Department North Carolina State University Raleigh NC 27695 USA
4. Texas A&M AgriLife Research San Angelo TX 76901 USA
5. Range Cattle Research and Education Center University of Florida Ona FL 33865 USA