sol (5) modèle (5) Soils (5) Example (5) argile (4) Afrique (4) South Africa (4) Clay (4) Soils (4) ruissellement (3) recherche (3) infiltration (3) débit (3) Development (3) Treatment (3) Water harvesting (3) Water (3) Values (3) Tillage (3) Seepage (3) Runoff (3) Research (3) Rain and rainfall (3) Corn (3) Properties (3) Research (3) Yields (3) Areas (3) eau du sol (2) limon (2)