Mountains (3) Soils (3) Erosion (3) Erosión (3) Suelos (3) Érosion (3) Pédologie (3) Érosion (3) Sols (3) Montagnes (3) érosion (3) Preservation (2) Conservation (2) Biomass (2) Water (2) Rain and rainfall (2) Production (Economic theory) (2) Licenses (2) Farmers (2) Canals (2) Technique (2) Land tenure (2) Labor productivity (2) Irrigation (2) Effectiveness (2) Protection (2) Trabajo--Productividad (2) Biomasa (2) Autorizaciones (2) Agricultores (2)