[1] Univ Natl Agr Benin, Ecole Foresterie & Ingn Bois, BP 43, Ketou, Benin
[2] Int Crops Res Inst Semi Arid Trop, BP 320, Bamako, Mali
[3] Univ Ghana, Inst Environm & Sanitat Studies, POB LG 209, Legon, Accra, Ghana
[4] Univ Abomey Calavi, Fac Agron Sci, 01 BP 526, Cotonou, Benin
[5] IITA, POB 1269, Kigali, Rwanda
[6] Wageningen Univ & Res, Knowledge Technol & Innovat Grp, POB 8130, NL-6700 EW Wageningen, Netherlands
[7] Int Crops Res Inst Semi Arid Trop, CGIAR Res Program Climate Change Agr & Food Secur, BP 320, Bamako, Mali
[8] World Agroforestry Ctr ICRAF, POB 30677, Nairobi 00100, Kenya
[9] ILRI, CGIAR Res Program Climate Change Agr & Food Secur, POB 30709, Nairobi 00100, Kenya