Table 1 Physico-chemical properties of the field soil, corn cob biochar and farmyard compost used in the previous experiment
From: Residual effects of corncob biochar on tropical degraded soil in central Uganda
Parameters | Corn cob biochar | Farmyard manure compost | Experimental soil | |
|---|---|---|---|---|
pH-H2O | 6. 9 | 6.12 | 5.1 | |
Total organic carbon (%) | 73 | 68.2 | 0.33 | |
Total nitrogen (%) | 0.75 | 1.50 | 0.29 | |
Available phosphophorus (mg/kg) | 6.57 | 7.13 | 5.21 | |
Potassium (cmol/kg) | 7.9 | 4.36 | 0.43 | |
Calcium (cmol/kg) | 1.1 | 0.71 | 0.4 | |
Sodium (cmol/kg) | 0.9 | 1.32 | 0.9 | |
Magnesium (cmol/kg) | 1.4 | 3.41 | 2.1 | |
Cation exchange capacitity (cmol/kg) | 1.7 | 0.98 | 4.32 | |
Percent sand | NA | NA | 64 | |
Percent clay | NA | NA | 30 | |
Percent silt | NA | NA | 6 | |