Table 1.
Pearson correlation values (r) and associated significance levels between ash dose (field equivalents 0, 3, 12 and 90 t ha−1) and incubation time, and soil physicochemical parameters.
| Agricultural soil | Forest soil | |||
|---|---|---|---|---|
| Explanatory variable | Ash dose (t ha−1) | Time (days) | Ash dose (t ha−1) | Time (days) |
| pH | 0.76*** | 0.15 | 0.98*** | 0.07 |
| Conductivity (µS cm−1) | 0.82*** | 0.14 | 0.99*** | 0.07 |
| DOC (mg g−1 DW soil) | 0.74*** | 0.33* | 0.91*** | 0.05 |
| Ammonium (µg g−1 DW soil) | 0.05 | 0.57*** | 0.40** | 0.36 |
| Nitrate (µg g−1 DW soil) | −0.45*** | 0.28* | 0.63*** | −0.15 |
| Phosphate (µg g−1 DW soil) | −0.61* | −0.07 | 0.26 | −0.04 |
*P< 0.05, **P< 0.01, ***P< 0.001.