Equations / Aboveground biomass
North American taxa group: Oleaceae < 0.55 spg (Table 5)
Aboveground biomassOleaceae < 0.55 spg (Fraxinus nigra, F. pennsylvanica, Fraxinus spp.) · OleaceaeUnited StatesmixedRead from the original paper
Fitted on these 2 species and others the paper does not name here: Fraxinus nigra, Fraxinus pennsylvanica
Many species, no single photo
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(-2.0314 + 2.3524 * ln(D))D- Diameter at breast height (1.3 m), cm
Black and green ash, plus 'Fraxinus spp.'. Median specific gravity of the group: 0.51. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Oleaceae < 0.55 spg 0.51 −2.0314 2.3524 54 9 dbh 3–43 0.84
Oleaceae Fraxinus nigra Ash, black 543 0.45 4
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–43 cm
- R²
- 0.84
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 54 pseudodata points generated from 9 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
391
Aboveground biomass (kg)
184
Carbon (kg), ×0.47
674
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 | 391 | 391 | 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
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- 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