Kristina Roing de Nowina, Resource Development and Partnerships, Center for International Forestry Research (CGIAR), Nairobi, Kenya, Geoffrey Kimutai, Natural Resource Management Unit, International Institute of Tropical Agriculture (CGIAR), Nairobi, Kenya, Erik Karltun, Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden, Gert Nyberg, Faculty of Forest Sciences Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umea, Sweden, Olof Andren, Olof Andren, Professor, Upssala, Sweden, Dries Roobroeck, Natural Resource Management Unit, International Institute of Tropical Agriculture (CGIAR), Nairobi, Nairobi, KENYA, Bernard Vanlauwe, PO Box 30722, International Institute of Tropical Agriculture, Nairobi, Nairobi, KENYA and Thomas Kätterer, Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden