[1] UPR AIDA, CIRAD, Harare, Zimbabwe
[2] Univ Montpellier, CIRAD, AIDA, Montpellier, France
[3] Univ Zimbabwe, Dept Plant Prod Sci & Technol, Harare, Zimbabwe
[4] Univ Hohenheim, Hans Ruthenberg Inst, Inst Agr Sci Trop, Stuttgart, Germany
[5] Univ Montpellier, CIHEAM IAMM, ABSys, CIRAD,INRAE,Inst Agro, Montpellier, France
[6] Univ Waterloo, Sch Environm Resources & Sustainabil, Waterloo, ON, Canada
[7] ICRAF Southeast Asia, World Agroforestry, Bogor, Indonesia
[8] Wageningen Univ & Res, Plant Prod Syst, Wageningen, Netherlands