Rapid soil redistribution within alleys: why simple extension models for contour hedgerows may not be appropriate

agroforesteria agroforesterie agroforestry agrosilvicultural systems cerca viva conservation des sols constraints contour cultivation contrainte cultivo en curvas de nivel culture en courbe de niveau erosion fertilidad del suelo haie hedges modele modelos models sloping land soil soil conservation soil fertility sol sostenibilidad suelo sustainability terre en pente terreno en declive