The effectiveness of contour hedgerows for soil and water conservation

adoption de l'innovation agriculteur agricultores agroforesteria agroforesterie agroforestry agrosilvicultural systems cerca viva conciencia social conscience sociale conservation de l'eau conservation des sols contour cultivation cultivo en curvas de nivel culture en courbe de niveau espacement espaciamiento farmers haie hedges infiltration innovation adoption participation sloping land social consciousness soil conservation spacing terre en pente terreno en declive tropical zones water conservation zona tropical zone tropicale