1. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts, Amherst, MA 01002.
2. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts, Amherst, MA 01002 (corresponding author).
3. Deputy Division Director, International Food Policy Research Institute, Washington, DC 20006.
4. Postdoctoral Research Associate, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts, Amherst, MA 01002.
5. Professor, Dept. of Irrigation and Drainage, Univ. of Agriculture, Faisalabad, Pakistan.
6. Director, International Waterlogging and Salinity Research Institute, Water and Power Development Authority, Lahore, Pakistan.