1. Section of Remote Sensing, Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
2. The Remote Sensing Laboratory, Department of Geography and Human Environment, Tel-Aviv University, P.O. Box 39040, Ramat Aviv, 69978 Tel-Aviv, Israel
3. Soil and Landscape Program, CSIRO Land and Water, Bruce E. Butler Laboratory, Clunies-Ross Street Black Mountain, P.O. Box 1666, Canberra, ACT 2601, Australia
4. Soil Science Department, Luiz de Queiroz College of Agriculture, São Paulo, University of Piracicaba, SP 13418-900, Brazil