1. Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China
2. College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071001, China
3. Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, China
4. School of Environmental Science and Engineering, South University of Science and Technology of China, Shenzhen 518055, China
5. Wageningen, Environmental Research P.O. Box 47, 6700 AA Wageningen, The Netherlands
6. Rothamsted Research, Harpenden, Herts AL5 2JQ, U.K.
7. Institute for Sustainable Development and International Relations (IDDRI), 41, rue du Four 75006 Paris, France