| Age of Plantation (years) | Bulk Density (g cm−3) | SOC concentration (%) | SOC Stock (Mg・C・ha−1) | |||
| 0 - 20 cm | 20 - 40 cm | 0 - 20 cm | 20 - 40 cm | 0 - 20 cm | 20 - 40 cm | |
| 1 | 0.57 ± 0.02 | 0.50 ± 0.00 | 2.2 ± 0.03 | 1.23 ± 0.02 | 25.10 ± 0.87 | 12.38 ± 0.13 |
| 2 | 0.56 ± 0.01 | 0.51 ± 0.00 | 2.15 ± 0.05 | 1.23 ± 0.05 | 24.21 ± 0.86 | 12.47 ± 0.52 |
| 3 | 0.55 ± 0.02 | 0.51 ± 0.01 | 2.08 ± 0.01 | 1.17 ± 0.02 | 22.96 ± 0.73 | 11.92 ± 0.23 |
| 4 | 0.55 ± 0.01 | 0.51 ± 0.00 | 1.79 ± 0.04 | 1.04 ± 0.03 | 19.86 ± 0.71 | 10.66 ± 0.21 |
| 5 | 0.54 ± 0.01 | 0.51 ± 0.00 | 1.6 ± 0.03 | 1.02 ± 0.02 | 17.29 ± 0.65 | 10.40 ± 0.22 |
| 6 | 0.54 ± 0.01 | 0.51 ± 0.00 | 1.43 ± 0.04 | 0.82 ± 0.07 | 15.49 ± 0.67 | 8.30 ± 0.70 |
| 7 | 0.53 ± 0.00 | 0.50 ± 0.01 | 1.73 ± 0.03 | 0.78 ± 0.05 | 18.41 ± 0.31 | 7.80 ± 0.46 |
| 8 | 0.56 ± 0.01 | 0.51 ± 0.00 | 1.91 ± 0.08 | 0.67 ± 0.06 | 21.37 ± 1.18 | 6.83 ± 0.53 |
| 9 | 0.55 ± 0.01 | 0.52 ± 0.00 | 1.86 ± 0.05 | 0.63 ± 0.09 | 20.37 ± 0.54 | 6.57 ± 0.88 |
| 10 | 0.53 ± 0.01 | 0.51 ± 0.00 | 2.08 ± 0.04 | 0.79 ± 0.12 | 22.17 ± 0.59 | 8.12 ± 0.29 |
| 11 | 0.53 ± 0.01 | 0.51 ± 0.00 | 1.84 ± 0.06 | 1.07 ± 0.05 | 19.62 ± 0.73 | 10.94 ± 0.44 |