Table 1. Physicochemical properties of the soil (calcaric leptosol) and the biochar used in this study.
| Parameters | Soil | Biochar |
|---|---|---|
| Sand (%) | 44.94 | ND |
| Silt (%) | 35.37 | ND |
| Clay (%) | 19.69 | ND |
| pH (H2O) | 8.4 | 9.8 |
| Ctot (%) | 1.87 | 51.90 |
| Corg (%) | 0.91 | 48.87 |
| Ntotal (%) | 0.17 | 0.59 |
| S (%) | 0.04 | 0.15 |
| C:N | 11 | 88 |
| Particle density (g cm−3) | ND | 2.0 |
| Ash content (%) | ND | 45.7 |
| CEC (mmolc kg−1) | ND | 103.4 |
| EC (mS m−1) | ND | 33.7 |
| Total surface area (m2 g−1) | ND | 303 |
Abbreviations: CEC, cation exchange capacity; EC, electrical conductivity; ND, not determined.