1 Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Garbenstr. 13, 70599, Stuttgart, Germany. sahrah.fischer@uni-hohenheim.de.
2 International Fund for Agricultural Development (IFAD), Via Paolo di Dono, 44 00142, Rome, Italy.
3 World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri, PO Box 30677, Nairobi, 00100, Kenya.
4 Faculty of Life Sciences, Rhine-Waal University of Applied Sciences, Marie-Curie-Straße 1, 47533, Kleve, Germany.