Variables | Pedoclimatic zones | |||
Sahelian sandy | Sahelo-sudanian sandy | Sahelo-sudanian loamy sand | Sudanian sandy loam | |
Bulk density (g/cm3) | 1.8 (0.02) a | 1.8 (0.1) a | 1.8 (0.1) a | 1.9 (0.1) a |
Soil moisture (%) | 0.46 (0.6) a | 0.32 (0.2) a | 1.84 (2.6) a | 6.52 (2.2) b |
pH | 7.4 (0.6) a | 6.3 (0.5) b | 6.1 (0.4) b | 5.7 (0.5) c |
Total C (g/kg) | 0.8 (0.3) a | 0.7 (0.3) a | 1.1 (0.6) a | 2.2 (0.7) b |
Total N (g/kg) | 0.05 (0.06) a | 0.06 (0.05) ab | 0.06 (0.05) ab | 0.14 (0.05) b |
N_min (µg/g) | 1.4 (0.2) a | 1.8 (0.2) a | 2.7 (1.7) a | 7.04 (2.8) b |
C/N ratio | 15.8 (1.9) a | 14.6 (7.7) a | 36 (17.9) a | 16.8 (2.2) a |
CEC (cmole/kg) | 1.9 (0.3) a | 1.8 (0.7) a | 3.3 (2.5) a | 2.7 (0.9) a |