1. Texas A&M AgriLife Research and Extension Center at Uvalde; 1619 Garner Field Rd. Uvalde TX 78801
2. Key Lab. of Agricultural Water Resources; The Center for Agricultural Resources Research; Institute of Genetics and Developmental Biology; The Chinese Academy of Sciences; 286 Huaizhong Road Shijiazhuang Hebei 050021 China
3. Dep. of Earth Sciences; Univ. of Southern California; 3651 Trousdale Pkwy Los Angeles CA 90089
4. Texas A&M AgriLife Research and Extension Center at Amarillo; 6500 Amarillo Blvd. W. Amarillo TX 79106
5. Independent Researcher; 1606 Knox Rd. Ardmore OK 73401
6. Dep. of Soil and Crop Sciences; Texas A&M Univ.; 370 Olsen Blvd, 2474 TAMU College Station TX 77843