| pH | Electrical conductivity (mmhos/cm3) | Extractable acidity (meq/100g) |
Adjacent control sites (ACS) | 7.81 ± 0.06 | 21.41 ± 1.10 | 0.88 ± 0.02 |
Charcoal kiln sites (CKS) | 8.52 ± 0.05 | 25.22 ± 0.88 | 0.67 ± 0.02 |
Relative change (%) | 9.12 | 17.80 | −24.05 |
p-value | <0.001 | <0.01 | <0.001 |