1. Extension Irrig. Specialist, Cooperative Extension and Dept. of Hydrologic Sci., Univ. of California, Davis, CA 95616.
2. Asst. Prof., Dept. of Agric. and Food Engrg., Indian Inst. of Technol., Kharagpur, WB 721 302, India.
3. Prof., Dept. of Biol. and Agric. Engrg. and Dept. of Hydrologic Sci., Univ. of California, Davis, CA.