1. Key
Laboratory of Agri-informatics, Ministry of Agriculture/Institute
of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2. Department
of Land Resources and Environment Studies, School of Geography and
Planning, Sun Yat-Sen University, Guangzhou, 510275, China
3. International Food Policy Research Institute, 2033 K Street, NW, Washington, DC 20006, United States