1. Department of Agribusiness and Natural Resource Economics, Makerere University, Kampala, Uganda;
2. World Agroforestry (ICRAF), Nairobi, Kenya;
3. NARO/National Semi-Arid Resources Research Institute (NaSARRI), Soroti, Uganda;
4. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Nairobi, Kenya