Sichuan Center for Rural Development Research Sichuan Agricultural University Chengdu 611130 P.R.China;
Leibniz Institute of Agricultural Development in Transition Economies (IAMO) Halle (Saale) 06120 Germany;
Leibniz Institute of Agricultural Development in Transition Economies (IAMO) Halle (Saale) 06120 Germany;
Leibniz Institute of Agricultural Development in Transition Economies (IAMO) Halle (Saale) 06120 Germany;
Geography Department Humboldt-Universität zu Berlin Berlin 10099 Germany;
Integrative Research Institute on Transformations of Human-Environment Systems (IRI THESys) Humboldt-Universität zu Berlin Berlin 10099 Germany;