AGROECOLOGICAL ZONES | SUDAN SAVANNAH | NORTHERN GUINEA SAVANNAH | SOUTHERN GUINEA SAVANNAH | ||||||
Soil Properties | Min | Max | Mean ± SD | Min | Max | Mean ± SD | Min | Max | Mean ± SD |
pH level | 5.4 | 8.4 | 6.67 ± 1.27 | 5 | 6 | 5.63 ± 0.45 | 5.1 | 7.8 | 6.33 ± 1.11 |
Available P (mg/l) | 3 | 4.4 | 3.8 ± 0.59 | 4 | 9.4 | 6 ± 2.42 | 3 | 49.8 | 18.8 ± 21.8 |
Available K (mg/l) | 18.2 | 54.4 | 40.8 ± 16.1 | 58 | 90.6 | 71 ± 14.1 | 28.2 | 184 | 87 ± 67.1 |
Available Mg (mg/l) | 47.4 | 68 | 57.4 ± 8.42 | 67.2 | 124 | 83.1 ± 28.9 | 50.9 | 123 | 95.3 ± 31.72 |
Sand (2.00 - 0.063 mm) | 85 | 87 | 86 ± 0.82 | 47 | 68 | 54.3 ± 9.7 | 78 | 81 | 79.3 ± 1.25 |
Silt (0.063 - 0.002 mm) | 9 | 13 | 11 ± 1.63 | 24 | 43 | 36.3 ± 8.73 | 13 | 15 | 14 ± 0.82 |
Clay (<0.002 mm) | 2 | 5 | 3 ± 1.41 | 8 | 10 | 9.33 ± 0.94 | 4 | 8 | 6.67 ± 1.89 |
Available Ca (mg/l) | 249 | 430 | 328 ± 75.4 | 200 | 727 | 451 ± 215 | 572 | 909 | 773.3 ± 145.2 |
Organic Matter (w/w) | 0.5 | 0.7 | 0.70 ± 0.16 | 1.6 | 2.2 | 1.8 ± 0.28 | 1 | 1.9 | 1.53 ± 0.39 |