| Forest | Total SOC (Tg C) | SOC (Mg C ha−1) |
| Spruce | 1700 | 260 |
| Aspen birch | 3000 | 270 |
| Slash pine | 1100 | 140 |
| Oak/Pine | 1600 | 80 |
| Loblolly Pine | 2100 | 90 |
| Oak/Hickory | 4200 | 85 |
| Spruce/Fir | 1000 | 170 |
| Douglass Fir | 1400 | 100 |
| Elm/Ash/Cottonwood | 200 | 120 |
| White/Red Pine | 1300 | 190 |
| Maple/Beech/Birch | 2800 | 140 |