Table 1.
Properties of the experimental site and biochar prior to experimentation in 2017.
| Properties | Soil | Biochar |
|---|---|---|
| Sand (%) | 68.1 ± 1.3 | NA |
| Silt (%) | 16.2 ± 1.2 | NA |
| Clay (%) | 15.7 ± 1.1 | NA |
| Textural class | Sandy loam | NA |
| Bulk density (Mg m−3) | 1.57 ± 0.04 | 0.60 ± 0.03 |
| Porosity (%) | 40.75 ± 1.4 | 77.35 ± 1.5 |
| Organic carbon (%) | 1.17 ± 0.03 | 52 ± 1.2 |
| Total N (%) | 0.18 ± 0.01 | 0.65 ± 0.02 |
| C : N ratio | 6.5 | 80 |
| Ash (%) | NA | 0.49 ± 0.01 |
| Available P (mg kg−1) | 11.1 ± 0.3 | 0.36 ± 0.01 |
| Exchangeable K (cmol kg−1) | 0.10 ± 0.01 | 1.75 ± 0.02 |
| Exchangeable Ca (cmol kg−1) | 2.72 ± 0.03 | 4.51 ± 0.1 |
| Exchangeable Mg (cmol kg−1) | 0.42 ± 0.01 | 7.75 ± 0.1 |
| pH (water) | 5.69 ± 0.04 | 7.61 ± 0.05 |
| Electrical conductivity (dS m−1) | 0.11 ± 0.01 | 0.41 ± 0.02 |