| Cu (mg/kg) | Mn (mg/kg) | Fe (mg/kg) | Pb (mg/kg) | Cr (mg/kg) | Cd (mg/kg) |
Adjacent control sites (ACS) | 1.17 ± 0.11 | 15.92 ± 1.73 | 136.03 ± 8.63 | 5.00 ± 0.00 | 1.06 ± 0.08 | ND |
Charcoal kiln sites (CKS) | 1.23 ± 0.09 | 13.33 ± 1.39 | 97.20 ± 6.88 | ND | 0.99 ± 0.09 | ND |
Relative change (%) | 4.70 | −16.28 | −28.54 | NA | −6.35 | NA |
p-value | ns | ns | <0.001 | ns | ns | ns |