Table 2.
Effect of biochar on some selected soil physical properties in 2017 and 2018.
| Year | Biochar rate (t ha−1) | Bulk density (Mg m−3) | Porosity (%) | Moisture content (%) | MWD (mm) | DR (%) | IR (cm hr−1) | Soil loss (cm) | Soil loss (kg ha−1) |
|---|---|---|---|---|---|---|---|---|---|
| 2017 | 0 | 1.58a | 40.4d | 9.6d | 1.06d | 71a | 10.6d | 2.25a | 355.5a |
| 10 | 1.44b | 45.7c | 11.2c | 1.41c | 65b | 17.7c | 1.75b | 252.0b | |
| 20 | 1.30c | 50.9b | 13.1b | 1.61b | 60c | 21.4b | 1.20c | 156.0c | |
| 30 | 1.08d | 59.2a | 14.9a | 1.82a | 55d | 24.1a | 1.10d | 118.0d | |
| 2018 | 0 | 1.59a | 40.0d | 10.1d | 1.05d | 72a | 10.1d | 2.29a | 365.1a |
| 10 | 1.38b | 47.9c | 12.6c | 1.55c | 61b | 18.2c | 1.70b | 234.6b | |
| 20 | 1.20c | 54.7b | 14.6b | 1.71b | 56c | 23.4b | 1.09c | 130.8c | |
| 30 | 0.91d | 66.0a | 15.9a | 1.95a | 48d | 27.7a | 0.75d | 68.25d | |
| Year (Y) | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ |
| Biochar (B) | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ |
| Y × B | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ |
Values followed by similar letters under the same column are not significantly different at p=0.05 according to Duncan's multiple range test; MWD = mean weight diameter of soil aggregate; DR = dispersion ratio; IR = infiltration rate.