Research Article
Soil Application of Tannery Land Plaster: Effects on Nitrogen Mineralization and Soil Biochemical Properties
Table 2
Main physical and chemical characteristics of the two soils (M and P).
| Parameter | Units | Soil | M | P |
| Sand | (g kg−1) | 330 | 340 | Silt | (g kg−1) | 510 | 500 | Clay | (g kg−1) | 160 | 160 | Water holding capacity (WHC) | (g kg−1) | 310 | 280 | pH (in water) | — | 8.3 | 7.9 | Total calcium carbonate (CaCO3) | (g kg−1) | 15 | 20 | Cation exchange capacity (CEC) | (cmolc kg−1) | 26 | 25 | Total organic C (TOC) | (g kg−1) | 10.6 | 7.7 | Total Kjeldahl N (TKN) | (g kg−1) | 1.1 | 0.91 | C : N ratio | — | 10 | 8.5 | Olsen-P | (mg kg−1) | 18 | 42 | Total Mn | (mg kg−1) | 42 | 40 | Total Cr | (mg kg−1) | 25 | 23 | Extractable Cr | (mg kg−1) | 0.63 | 0.57 | Cr(VI) | (mg kg−1) | <0.5* | <0.5* |
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*Detection limit.
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