Ouest (1) Sénégal (1) Assaying (1) Platforms (1) Observations (1) Platforms (1) Observations (1) Nineteen sixties (1) Zone of aeration (1) Wealth (1) Groundwater (1) Water (1) Value (1) Seepage (1) Rivers (1) Revenge (1) Percentage (1) Paradoxes (1) Paradox (1) Ladders (1) Impact (1) Experience (1) Droughts (1) Use studies (1) Use studies (1) Last years (1) Analysis (1) Attitudes (1) Soils (1) Science (1)