1. Department of Crop Sciences, University of Göttingen, Göttingen, Germany
2. Department of Geography, Philipps-Universität Marburg, Marburg, Germany
3. Department for Environment and Water, SA Government, Adelaide, Australia
4. U.S. Geological Survey, Southwest Biological Science Center, Tucson, AZ, USA
5. Biosystems engineering, The University of Arizona, Tucson, AZ, USA
6. Soil Conservation and Watershed Management Research Department, AREEO, Isfahan, Iran
7. School of Environment, University of Technology Sydney, Ultimo, Australia