1. Department of Environmental Sciences and Management, University of Liege, Arlon, Belgium
2. Terra Research Center, GxABT, Université of Liege, Gembloux, Belgium
3. Department of Natural Resources Management, Institute of Environment and Agricultural Research, Ouagadougou, Burkina Faso
4. Department of Anthropology, Emory University, Atlanta, GA, USA
5. Ministère de l’Agriculture et des Aménagements Hydro-agricoles, Ouagadougou, Burkina Faso