Community forestry: herders' decision-making in natural resources management in arid and semi-arid Africa

agricultura tradicional agriculture traditionnelle arid zones asociaciones de agricultores association d'agriculteurs communal forests farmers associations gestion des ressources natural resources nature reserves parcours pastoralism pastoralisme pastoralismo rangelands recursos naturales reservas naturales resource management ressource naturelle semiarid zones site factors tierras de pastos traditional farming water management zone aride