Table 2. Soil characteristics for each block used in this study.
| Soil | Contaminant level | pH | Organic matter (%) | CEC (meq per 100 g) | Ca (kg ha−1) | P (kg ha−1) | Al (ppm) | K (kg ha−1) | Mg (kg ha−1) |
|---|---|---|---|---|---|---|---|---|---|
| N1 | No contamination | 6.5 | 6.1 | 24.6 | 6637 | 182 | 850 | 734 | 1551 |
| N3 | No contamination | 5.4 | 4.9 | 17.7 | 4171 | 199 | 904 | 378 | 569 |
| N5 | No contamination | 5.6 | 7.2 | 22 | 5587 | 182 | 961 | 421 | 896 |
| C3 | Low contamination | 6.7 | 9.2 | 27.9 | 8423 | 209 | 627 | 665 | 1230 |
| C4 | High contamination | 7.4 | 5.5 | 37.5 | 14062 | 26 | 727 | 692 | 1434 |
| C5 | High contamination | 7.4 | 2.2 | 25.8 | 7659 | ⩽10 | 925 | 580 | 2166 |