1. Department of Biological Sciences, University of Ngaoundere, Ngaoundere, Cameroon
2. Unit of Coordination and Management of Project for Strengthening of the Productivity of Family Agropastoral Farms and Resilience, Ministry of Production, Irrigation and Agricultural Equipment, Mongo, Chad
3. Research Laboratory of Natural Substances, Faculty of Applied and Exact Sciences, University of N’djamena, N’djamena, Chad
4. International Fund for Agriculture, Climate Change and Environment Department, Yaounde, Cameroon