1. Lecturer, The Wyler Dept. of Dryland Agriculture, Jacob Blaustein Institutes for Desert Research, Ben-Gurion Univ. of the Negev, Sede Boqer Campus, 84990, Israel; formerly, Postdoctoral Student, Dept. of Soil, Water, and Environmental Science, Univ. of Arizona, Tucson, AZ 85721.
2. Senior Lecturer, Dept. of Soil and Water Sciences, Faculty of Agriculture, Food and Environmental Quality Sciences, Hebrew Univ. of Jerusalem, Rehovot 76100, Israel.
3. Chair and Professor, Dept. of Plant and Soil Science, Texas Tech Univ., Lubbock, TX 79409; formerly, Professor, Dept. of Soil, Water, and Environmental Science, Univ. of Arizona, Tucson, AZ 85721.
4. Professor, Dept. of Soil, Water, and Environmental Science, Univ. of Arizona, Tucson, AZ 85721.