Equations / Aboveground biomass
North American taxa group: Picea ≥ 0.35 spg (Table 5)
Aboveground biomassPicea ≥ 0.35 spg (P. abies, P. glauca, P. mariana, P. rubens) · PinaceaeUnited StatesmixedRead from the original paper
Fitted on these 4 species: Picea abies, Picea glauca, Picea mariana, Picea rubens
Equation
As printed (Table 5 caption, p. 140)
ln(biomass) = β0 + β1 ln(diameter)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-2.1364 + 2.3233 * ln(D))D- Diameter at breast height (1.3 m), cm
Norway, white, black and red spruce. Median specific gravity of the group: 0.37. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Picea ≥ 0.35 spg 0.37 −2.1364 2.3233 289 46 dbh 3–72 0.81
P. mariana Spruce, black 95 0.38 21
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–72 cm
- R²
- 0.81
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 289 pseudodata points generated from 46 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
319
Aboveground biomass (kg)
150
Carbon (kg), ×0.47
550
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 30 | 319 | 319 | Computed from the printed form computed from the published form at dbh = 30 cm |
Related
- North American taxa group: Abies ≥ 0.35 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Abies < 0.35 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Aceraceae ≥ 0.50 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Aceraceae < 0.50 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.40–0.49 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.50–0.59 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae ≥ 0.60 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae < 0.40 spg (Table 5) · same paper · Aboveground biomass