1. Leibniz Centre for Agricultural Landscape Research (ZALF), Sustainable Land Use in Developing Countries (SusLAND), Müncheberg, Germany
2. Faculty of Life Science, Thaer-Institute of Agriculture and Horticultural Sciences, Department of Agricultural Economics, Humboldt-Universität zu Berlin, Berlin, Germany
3. Center for International Forestry Research-World Agroforestry Center (CIFOR-ICRAF), Dar es Salaam, Tanzania
4. Swedish University of Agricultural Sciences, Crop Production Ecology, Uppsala, Sweden
5. Faculty of Life Science, Thaer-Institute of Agriculture and Horticultural Sciences, Department of Urban Plant Ecophysiology, Humboldt-Universität zu Berlin, Berlin, Germany