|  |  | Organic C content (kg m−2) |  |  | |
---|---|---|---|---|---|---|
 | Deciduous | Jack pine | Mixed | Balsam fir | Black spruce | Mean |
Forest floor | 3.9 (0.8–12.8) | 4.1 (0.7–11.6) | 4.4 (1.3–10.6) | 4.7 (1.6–11.8) | 5.8 (1.0–12.3) | 4.5 (0.7–12.8) |
Mineral soil | 6.5 (0.1–26.3) | 4.4 (0.2–13.3) | 5.9 (0.1–17.2) | 6.6 (0.2–27.9) | 6.0 (0–24.9) | 6.2 (0–27.9) |