Variables | ST 1 | ST 2 | ST 3 | Overall mean | Range |
Zn (ppm) | 6.33 ± 0.75a | 1.85 ± 0.16b | 1.35 ± 0.0.27b | 1.77 ± 0.53 | 1.35 - 6.33 |
Cr (ppm) | 0.62 ± 0.15a | 0.86 ± 0.19a | 0.47 ± 0.06b | 0.65 ± 0.21 | 0.47 - 0.86 |
Pb (ppm) | 0.27 ± 0.19a | 0.15 ± 0.06b | 0.15 ± 0.05b | 0.19 ± 0.11 | 0.15 - 0.27 |
Fe (ppm) | 1.68 ± 0.31a | 1.53 ± 0.41a | 1.20 ± 0.25a | 1.52 ± 0.34 | 1.20 - 1.68 |