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| Parameter | White clover biochar | Poultry manure biochar |
|---|---|---|
| Color | Black | Black |
| Odour | Slight odor, like burnt wood | Slight, earthen odor |
| Conversion efficiency (%) | 50.0 | 75.0 |
| pH | 8. 5 | 8.3 |
| Organic matter (g kg-1) | 906.3 | 610.1 |
| Total Carbon (g kg-1) | 526.0 | 354.0 |
| Total Nitrogen (g kg-1) | 11.3 | 15.2 |
| C:N ratio | 47:1 | 23:1 |
| Ash (g kg-1) | 60.0 | 280.0 |
