A 9 minute 22 second film produced by the French National Research Institute for Sustainable Development (IRD) in collaboration with the Senegalese Agronomic Research Institute (ISRA) and the International Laboratory for Ecological Intensification of Cultivated Soil in West Africa (Iesol).Director L. Croes, Scientific advisors D. Masse, C. Clermont-Dauphin, L. Cournac, T. Chevallier.