Soil conservation - An international study

conduite des herbages conservation des sols cultivated land cultivo migratorio erosion erosion control farm management forest land forest management gestion de l'exploitation agricole gestion du sol grassland management grasslands herbage land use legislation manejo de fincas manejo de praderas manejo del suelo methode methods planification planning praderas shifting cultivation soil conservation soil management terrain forestier tierras cultivadas tierras forestales utilisation des terres