Table 2.
The independent-samples t-test results of some properties in the studied soil
| Properties | Mean | Mean Difference | t | Sig. (2-tailed) | |
|---|---|---|---|---|---|
| Cultivated soil | Uncultivated soil | ||||
| Cd leached | 1.833 | 2.671 | -0.838 | -0.669 | 0.515 |
| pH | 7.000 | 7.252 | -0.252 | -3.417 | 0.004 |
| DOC | 65.504 | 29.865 | 35.639 | 8.730 | 0.000 |
| MBC | 395.220 | 198.451 | 196.777 | 12.137 | 0.000 |
| Soil respiration | 2.152 | 1.191 | 96.166 | -11.487 | 0.000 |
| qCO2 | 0.545 | 0.601 | -0.056 | -9.443 | 0.000 |
| DTPA-extractable Cd | 5.241 | 7.055 | -1.813 | -0.715 | 0.486 |
| F1 | 0.569 | 0.204 | 0.365 | 2.473 | 0.025 |
| F2 | 9.390 | 13.178 | -3.788 | -0.784 | 0.445 |
| F3 | 0.232 | 0.493 | -0.261 | -2.510 | 0.023 |
| F4 | 8.630 | 5.197 | 3.432 | 1.225 | 0.243 |
| F5 | 1.254 | 1.278 | -0.023 | -0.045 | 0.965 |
DOC, dissolved organic carbon; MBC, microbial biomass carbon; qCO2, metabolic quotient; F1, exchangeable; F2, bound to carbonates; F3, bound to organic matter; F4, bound to iron-manganese oxides; F5, residual fractions