Table 5. The chemical properties of Korea forest soils by regions.
| Soil horizon | Region | pH (1:5) | SOM (%) | TN (%) | CEC | K+ | Na+ | Ca2+ | Mg2+ |
| (cmolc/kg) |
| A | Gangwon | 5.28 ± 0.79 | 6.10 ± 2.65 | 0.27 ± 0.12 | 20.5 ± 9.8 | 0.21 ± 0.15 | 0.07 ± 0.04 | 3.41 ± 5.41 | 0.63 ± 0.92 |
| Gyonggi | 4.50 ± 046 | 4.74 ± 2.29 | 0.18 ± 0.10 | 16.9 ± 7.1 | 0.17 ± 0.11 | 0.05 ± 0.02 | 1.05 ± 1.80 | 0.29 ± 0.32 |
| Gyungnam | 4.58 ± 0.40 | 3.17 ± 4.54 | 0.22 ± 0.17 | 16.1 ± 10.2 | 0.21 ± 0.15 | 0.07 ± 0.03 | 1.44 ± 1.59 | 0.67 ± 0.70 |
| Gyungbuk | 5.01 ± 0.72 | 6.04 ± 3.89 | 0.30 ± 0.21 | 17.1 ± 8.3 | 0.17 ± 0.14 | 0.08 ± 0.05 | 2.42 ± 3.37 | 1.18 ± 1.53 |
| Jeonnam | 4.62 ± 0.33 | 5.69 ± 2.56 | 0.21 ± 0.09 | 16.1 ± 6.4 | 0.21 ± 0.11 | 0.11 ± 0.06 | 0.88 ± 1.02 | 0.39 ± 0.34 |
| Jeonbuk | 4.56 ± 0.47 | 4.89 ± 2.14 | 0.16 ± 0.09 | 19.1 ± 9.2 | 0.16 ± 0.13 | 0.13 ± 0.16 | 1.42 ± 2.07 | 0.48 ± 0.47 |
| Chungnam | 4.82 ± 0.36 | 4.24 ± 2.23 | 0.16 ± 0.10 | 13.6 ± 6.9 | 0.15 ± 0.09 | 0.05 ± 0.02 | 0.95 ± 1.76 | 0.41 ± 0.55 |
| Chungbuk | 4.82 ± 0.45 | 3.99 ± 2.09 | 0.16 ± 0.10 | 16.7 ± 6.9 | 0.14 ± 0.10 | 0.13 ± 0.19 | 1.79 ± 3.23 | 0.65 ± 1.10 |
| Jeju | 5.66 ± 0.70 | 13.35 ± 3.83 | 0.67 ± 0.23 | 40.8 ± 21.1 | 0.29 ± 0.17 | 0.23 ± 0.13 | 1.25 ± 1.01 | 0.88 ± 0.66 |
| Mean | 4.74 ± 0.60 | 5.21 ± 3.66 | 0.23 ± 0.18 | 17.6 ± 9.7 | 0.19 ± 0.14 | 0.09 ± 0.08 | 1.86 ± 3.18 | 0.69 ± 0.99 |
| B | Gangwon | 5.39 ± 0.83 | 3.98 ± 2.63 | 0.18 ± 0.11 | 18.5 ± 8.7 | 0.14 ± 0.10 | 0.07 ± 0.09 | 2.31 ± 4.13 | 0.45 ± 0.62 |
| Gyonggi | 4.74 ± 0.37 | 1.78 ± 1.38 | 0.07 ± 0.06 | 15.1 ± 6.7 | 0.14 ± 0.09 | 0.06 ± 0.04 | 0.90 ± 1.68 | 0.26 ± 0.29 |
| Gyungnam | 4.88 ± 0.40 | 1.30 ± 2.56 | 0.05 ± 0.10 | 11.0 ± 5.2 | 0.15 ± 0.07 | 0.10 ± 0.04 | 0.73 ± 0.73 | 0.47 ± 0.43 |
| Gyungbuk | 5.19 ± 0.71 | 3.42 ± 2.88 | 0.23 ± 0.26 | 15.2 ± 6.9 | 0.13 ± 0.11 | 0.09 ± 0.09 | 1.99 ± 2.86 | 1.16 ± 1.42 |
| Jeonnam | 4.81 ± 0.27 | 2.37 ± 1.66 | 0.10 ± 0.06 | 13.7 ± 5.8 | 0.16 ± 0.08 | 0.11 ± 0.06 | 0.60 ± 0.74 | 0.37 ± 0.47 |
| Jeonbuk | 4.84 ± 0.44 | 2.08 ± 1.52 | 0.06 ± 0.05 | 16.2 ± 7.6 | 0.12 ± 0.09 | 0.14 ± 0.18 | 0.82 ± 1.08 | 0.38 ± 0.40 |
| Chungnam | 4.79 ± 0.35 | 1.89 ± 1.15 | 0.06 ± 0.04 | 11.9 ± 5.2 | 0.12 ± 0.06 | 0.05 ± 0.03 | 0.60 ± 0.88 | 0.34 ± 0.47 |
| Chungbuk | 5.03 ± 0.46 | 1.87 ± 1.43 | 0.07 ± 0.07 | 14.4 ± 6.2 | 0.11 ± 0.08 | 0.13 ± 0.18 | 1.60 ± 3.44 | 0.60 ± 1.09 |
| Jeju | 5.70 ± 0.68 | 11.82 ± 4.70 | 0.57 ± 0.28 | 37.3 ± 20.7 | 0.15 ± 0.07 | 0.22 ± 0.12 | 0.47 ± 0.47 | 0.37 ± 0.30 |
| Mean | 4.96 ± 0.55 | 2.71 ± 3.20 | 0.12 ± 0.17 | 14.5 ± 8.0 | 0.14 ± 0.09 | 0.10 ± 0.09 | 1.30 ± 2.42 | 0.57 ± 0.86 |