Research Article
Soil Characteristics and Pedoclimatic Evaluation of Rainfed Sorghum (Sorghum bicolor (L.) Moench) in the Mayo-Lemié Division, South-Western Chad
Table 5
Land suitability evaluation for the production of sorghum.
| Characteristics | Evaluation of M3 for the production of Sorghum | Evaluation of M2 for the production of Sorghum | Evaluation of M1 for the production of Sorghum | Values | Classes | Limitations | Parametric values | Values | Classes | Limitations | Parametric values | Values | Classes | Limitations | Parametric values |
| Topography (t) | | | | | | | | | | | | | Slope (%) | 2 | S1-1 | 1 | 90 | 1 | S1-1 | 0 | 95 | 1 | S1-0 | 0 | 100 | Wetness () | | | | | | | | | | | | | Flooding | FO | S1-0 | 0 | 100 | F1 | S2 | 2 | 72.5 | F1 | S2 | 4 | 60 | Drainage | Good | S1-0 | 0 | 100 | moderate | S2 | 2 | 72.5 | Imperfect | S3 | 2 | 60 | Physical soil characteristics (s) | | | | | | | | | | | | | Texture/structure | S | S3 | 3 | 40 | SA | S1-0 | 0 | 100 | C<60s | S1-0 | 0 | 100 | Soil depth (cm) | >90 | S1-0 | 0 | 100 | >100 | S1-0 | 0 | 100 | >90 | S1-0 | 0 | 100 | Coarse fragments (%) | — | S1-0 | 0 | 100 | — | S1-0 | 0 | 100 | 0 | S1-1 | 0 | 100 | CaC03 (%) | 0 | S1-0 | 0 | 100 | 0 | S1-0 | 0 | 100 | 0 | S1-0 | 0 | 100 | Gypsum (%) | 0 | S1-0 | 0 | 100 | 0 | S1-0 | 0 | 100 | 0 | S1-0 | 0 | 100 | Soil fertility characteristics (f) | | | | | | | | | | | | | Apparent CEC (cmol (+)kg−1 clay) | 125.41 | S1-0 | 0 | 100 | 125.41 | S1-0 | 0 | 100 | 85.25 | S1-0 | 0 | 100 | Base saturation (%) | 20.41 | S2 | 2 | 68.75 | 32.15 | S2 | 2 | 74 | 27.69 | S2 | 2 | 74.85 | Organic carbon (%) | 2.20 | S1-0 | 0 | 100 | 2.20 | S1-0 | 0 | 100 | 2.2 | S1-0 | 0 | 100 | pH-H2O | 5.9 | S1-1 | 0 | 100 | 6.3 | S1-0 | 0 | 100 | 5.6 | S1-1 | 1 | 85 | Salinity and sodicity (n) | | | | | | | | | | | | | CEe (ms/cm) | 0.2 | S1-0 | 0 | 100 | 0.2 | S1-0 | 0 | 100 | 0.01 | S1-0 | 0 | 100 | ESP (%) | 0.36 | S1-0 | 0 | 100 | 2.8 | S1-0 | 0 | 100 | 0.6 | S1-0 | 0 | 100 | Suitability and calculated land index (Is) | | S3sS2f | | 44.29 | | S2wf | | 60.47 | | S3wS2f | | 41.33 |
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