| MAP (mm) | MAT (˚C) | Sands (%) | Clay (%) | Silt (%) |
Sahelian zone | 290.8 (23.6) a | 25.8 (0.5) a | 94.7 (1.3) a | 2.2 (0.3) a | 3.2 (1.3) a |
Western sahelo-sudanian zone | 377.1 (19.8) b | 27 (1.1) ab | 91.6 (3.9) a | 4.24 (2) ab | 4.2 (2.1) a |
Eastern sahelo-sudanian zone | 478.6 (69.7) b | 29.2 (0.5) c | 76.9 (10.6) b | 7.74 (3) b | 15.4 (8) ab |
Sudanian zone | 638.7 (77.5) c | 27.4 (0.5) b | 63.5 (8.1) c | 7.94 (4) b | 28.6 (7.3) b |