Evaluation of the level of soil fertility in the commune of Djidja : Our Knowledge Publishing : 9786205789605 : 6205789604 : 13 Mar 2023 : The evaluation of the soils of the commune of Djidja for cotton cultivation was carried out using the topo sequential method. The results showed that the soils of the commune have undergone significant chemical and biological degradation. Thanks to the method combining the climate, the physico-chemical characteristics of the soil according to the needs of the crop, the tropical ferruginous concretion soils of the slope are suitable for cotton cultivation. Depleted ferruginous soils, leached ferruginous soils of the summit, ferralitic soils of the slope are moderately suitable for cotton cultivation. Hydromorphic depleted ferruginous soils, eutrophic brown soils of the lower slopes are marginally suitable for cultivation. The ferruginous leached concretioned indurated soils at the top and the hydromorphic soils at the bottom of the slopes are unsuita