1. International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM-Bari), Via Ceglie 9, 70010 Bari, Italy
2. Natural Resources Institute Finland (Luke), Tietotie 4, 31600 Jokioinen, Finland
3. Alliance Bioversity International-CIAT (Centro Internacional de Agricultura Tropical), Via San Domenico 1, 00153 Rome, Italy
4. University Centre of Gaoua, Nazi Boni University, P.O. Box 01, Bobo-Dioulasso 1091, Burkina Faso
5. Programme Agrinovia, Joseph Ki-Zerbo University, P.O. Box 03, Ouagadougou 7021, Burkina Faso
6. Department of Rural Engineering, Water and Forests, Faculty of Agronomy, Abdou Moumouni University, Niamey P.O. Box 237, Niger
7. Department of Geography, Faculty of Letters and Human Sciences, Abdou Moumouni University, Niamey P.O. Box 237, Niger
8. Afrique Verte Niger (AcSSA), Niamey P.O. Box 11751, Niger
9. Institute of Sciences of Food Production, National Research Council (CNR), Via G. Amendola 122/O, 70126 Bari, Italy
10. Italian Agency for Development Cooperation (AICS), Ouaga 2000-Secteur 54, Arrondissement n. 12, Ouagadougou 01, Burkina Faso