Table 2. Soil C, N, C/N and pH in surface layer of seven soil profiles.
| Land use type | pH | TC (g kg−1) | TN (g kg−1) | TOC (g kg−1) | TON (g kg−1) | TIC (g kg−1) | TIN (g kg−1) | C/N1 |
|---|---|---|---|---|---|---|---|---|
| Rice fields | 5.6 | 18.11 | 1.74 | 15.45 | 1.20 | 2.66 | 0.54 | 10.41 |
| Sugar cane field | 6.1 | 17.95 | 1.41 | 15.29 | 1.35 | 2.66 | 0.06 | 12.73 |
| Oak field | 5.6 | 19.98 | 2.29 | 18.83 | 2.05 | 1.15 | 0.24 | 8.73 |
| Rice fields | 5.7 | 5.85 | 0.65 | 5.62 | 0.59 | 0.23 | 0.06 | 9.00 |
| Wasteland | 5.5 | 8.68 | 0.81 | 7.45 | 0.48 | 1.23 | 0.33 | 10.72 |
| Built-up land | 4.3 | 3.26 | 0.41 | 2.78 | 0.08 | 0.48 | 0.33 | 7.96 |
| Forest | 4.2 | 13.56 | 1.01 | 11.92 | 0.56 | 1.64 | 0.45 | 13.42 |
Note:
1
C/N, TC to TN ratio.