1. Texas A&M AgriLife Research at Vernon 11708 Highway 70 South Vernon TX 76384 USA
2. Department of Soil and Crop Sciences Texas A&M University 370 Olsen Blvd. College Station TX 77843 USA
3. Agricultural and Biological Engineering Department University of Florida 1741 Museum Rd. Gainesville FL 32611‐0570 USA
4. Texas A&M AgriLife Extension at Lubbock 1102 E FM 1294 Lubbock TX 79403 USA