1. Department of Soil Science and Plant Nutrition Faculty of Agriculture, Ankara University Ankara Turkey
2. UNESCO Chair on Eremology, Faculty of Biosciences Engineering University of Ghent Ghent Belgium
3. Department of Soil and Water Resources Transitional Zone Agricultural Research Institute/Ministry of Agriculture and Forestry Eskisehir Turkey
4. Department of Soil and Water Resources Soil, Fertilizer and Water Resources Central Research Institute/Ministry of Agriculture and Forestry Ankara Turkey
5. Department of Environment, Faculty of Biosciences Engineering University of Ghent Ghent Belgium