Table 2.
Physicochemical properties of the soils used in this study.
| Parameters | Serpentine soil | Pristine soil | ||
|---|---|---|---|---|
| pH | 7.5 - 8.5 | 7.3 – 7.5 | ||
| Organic matter (%) | 1.3 ± 0.1 | 1.6 ± 0.2 | ||
| Cation exchange capacity [meq(100g)-1] | 1.0 ± 0.2 | 1.5 ± 0.1 | ||
| Electrical conductivity (dS m-1) | 0.8 ± 0.1 | 1.2 ± 0.2 | ||
| Metals (mg kg-1) | Total | Extractable | Total | Extractable |
| Ni | 812 ± 35 | 4.3 ± 0.8 | 18 ± 1 | nd |
| Zn | 160 ± 12.3 | 48.7 ± 2.8 | 86 ± 10.5 | 9.3 ± 1.1 |
| Fe | 6849 ± 215 | 437 ± 12.1 | 653 ± 33 | 75.6 ± 12.1 |
Average ± SD from three samples. nd, not detected.