1. Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, The Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang 050021, Hebei China
2. Wageningen Environmental Research, Wageningen University & Research, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
3. School of Environment, Natural Resources and Geography, Bangor University, Bangor, LL57 2UW, U.K.
4. ADAS Boxworth, Cambridge, CB23 4NN, U.K.
5. Research Center for Rural Economy, Ministry of Agriculture and Rural Affairs, No. 56, Xisizhuanta Hutong, Beijing 100810, China
6. Key Laboratory of Nonpoint Source Pollution Control, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
7. Water Systems and Global Change Group, Wageningen University & Research, Droevendaalsesteeg 4, Wageningen, 6708 PB, The Netherlands