1. Humboldt University of Berlin, Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences, Berlin, Germany
2. International Institute for Tropical Agriculture (IITA), Yaoundé, Cameroon
3. CIRAD, Umr Innovation, Yaoundé, Cameroon
4. Innovation, Univ Montpellier, CIRAD, INRA, Montpellier, France
5. Leibniz-Centre for Agricultural Landscape Research (ZALF e.V.), Müncheberg, Germany
6. Department of Rural Sociology, University of Hohenheim, Institute of Social Sciences in Agriculture, Stuttgart, Germany
7. Department of Agricultural Economics, Humboldt University of Berlin, Berlin, Germany
8. Department of Crop Production Ecology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden