Table 1. Physicochemical properties (mean ± standard deviation) of the central Nacozari tailing from patches with vegetation and adjacent areas with no vegetation.
| Property | Patch with vegetation | Area with no vegetation | Statistical test | Significance | Adjusted p-values* |
|---|---|---|---|---|---|
| pH | 4.7 ± 0.2 | 4.5 ± 0.3 | t = 0.97 | p = 0.18 | 0.06 |
| Electrical conductivity (µS/cm) | 162.3 ± 80.1 | 112.9 ± 10.3 | t = 1.06 | p = 0.19 | 0.34 |
| Percentage of sand | 77.8 ± 4.5 | 79.8 ± 3.7 | t = 0.57 | p = 0.30 | 0.66 |
| Percentage of clay | 5.7 ± 2.9 | 6.1 ± 2.0 | t = 0.19 | p = 0.57 | 0.89 |
| As (mg kg−1) | 18.7 ± 2.3 | 21.0 ± 1.9 | t = 0.88 | p = 0.79 | 0.37 |
| Ba (mg kg−1) | 1,091.5 ± 46.8 | 1,172.5 ± 76.0 | t = 1.81 | p = 0.06 | 0.22 |
| Ca (mg kg−1) | 2,872.7 ± 1,779.1 | 1,286.0 ± 926.8 | t = 2.07 | p = 0.06 | 0.10 |
| Cu (mg kg−1) | 333.0 ± 96.3 | 271.5 ± 45.7 | t = 0.05 | p = 0.47 | 0.94 |
| Fe (mg kg−1) | 26,167.7 ± 6,454.6 | 31,604.2 ± 7,273.2 | t = 1.32 | p = 0.88 | 0.10 |
| K (mg kg−1) | 35,741.2 ± 1,247.6 | 36,821.0 ± 1,557.6 | t = 2.25 | p = 0.03 | 0.14 |
| Mn (mg kg−1) | 224.0 ± 22.7 | 225.7 ± 11.9 | t = 0.81 | p = 0.77 | 0.43 |
| Mo (mg kg−1) | 57.2 ± 15.8 | 65.5 ± 9.1 | t = 1.54 | p = 0.90 | 0.22 |
| Pb (mg kg−1) | 32.7 ± 6.5 | 34.0 ± 8.7 | t = 0.26 | p = 0.59 | 0.81 |
| Rb (mg kg−1) | 259.0 ± 9.1 | 255.0 ± 7.0 | t = 0.43 | p = 0.34 | 0.75 |
| Sr (mg kg−1) | 94.2 ± 22.5 | 84.5 ± 21.4 | t = 1.85 | p = 0.07 | 0.28 |
| Ti (mg kg−1) | 1,536.0 ± 208.7 | 1,394.5 ± 176.4 | t = 1.26 | p = 0.12 | 0.20 |
| Zn (mg kg−1) | 69.0 ± 3.4 | 68.7 ± 1.9 | t = 0.64 | p = 0.27 | 0.64 |
| Zr (mg kg−1) | 142.7 ± 4.8 | 136.2 ± 3.6 | t = 1.83 | p = 0.06 | 0.28 |
Notes.
*
Multiple testing correction using Bonferroni (R Core Team, 2013).