| Sawonjo | Ago-Iwoye | Ajegunle | |||||
| Season | Mean ± Std. Dev | Sig. | Mean ± Std. Dev | Sig. | Mean ± Std. Dev | Sig. | |
| Mn | Rainy | 14.6 ± 1.0 | 0.00 | 24.1 ± 1.0 | 0.00 | 21.0 ± 1.0 | 0.00 |
| Dry | 19.4 ± 1.4 | 31.7 ± 1.2 | 32.6 ± 0.8 | ||||
| Fe | Rainy | 1763 ± 17 | 0.00 | 1291 ± 12 | 0.00 | 2110 ± 90 | 0.00 |
| Dry | 1881 ± 38 | 1395 ± 14 | 2409 ± 10 | ||||
| Pb | Rainy | 4.10 ± 0.90 | 0.16 | 6.0 ± 0.8 | 0.97 | 6.7 ± 0.7 | 0.00 |
| Dry | 5.00 ± 1.20 | 6.0 ± 1.1 | 9.0 ± 1.0 | ||||
| Zn | Rainy | 87.5 ± 1.3 | 0.00 | 67.0 ± 1.1 | 0.00 | 68.0 ± 1.0 | 0.21 |
| Dry | 79.6 ± 1.0 | 71.0 ± 0.8 | 67.3 ± 0.7 | ||||
| Ni | Rainy | 6.6 ± 0.8 | 0.02 | 10.7 ± 0.9 | 0.02 | 8.7 ± 0.9 | 0.07 |
| Dry | 8.0 ± 1.0 | 12.1 ± 0.9 | 9.6 ± 0.7 | ||||