1. Cheikh Anta DIOP University, Dakar, Senegal
2. CIRAD, UPR AIDA, Nairobi, Kenya
3. Centre de Suivi Ecologique, Dakar, Senegal
4. CIRAD, UPR AIDA, Montpellier, France
5. CIRAD, UMR Eco&Sols, Dakar, Senegal
6. CIRAD, UMR AGAP Institut, Montpellier, France
7. Faculty of science, Cheikh Anta DIOP University, Dakar, Senegal
8. Polytechnic Institute of the University Cheikh Anta Diop, Dakar, Senegal