1. College of Land Science and Technology, China Agricultural University, Beijing, P.R. China;
2. Soil & Land Resources Assessment Division, National Remote Sensing Centre, ISRO, Hyderabad, India;
3. Carbon Management and Sequestration Center, The Ohio State University, Columbus, OH, USA;
4. State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, China;
5. Department of Agronomy, University of Agriculture, Faisalabad, Pakistan