Equations / Aboveground biomass
North American taxa group: Fabaceae/Juglandaceae, Carya (Table 5)
Aboveground biomassCarya (Carya illinoinensis, C. ovata, Carya spp.) · JuglandaceaeUnited StatesmixedRead from the original paper
Fitted on these 2 species and others the paper does not name here: Carya illinoinensis, Carya ovata
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(-2.5095 + 2.6175 * ln(D))D- Diameter at breast height (1.3 m), cm
Hickories: pecan, shagbark and 'Carya spp.'. Median specific gravity of the group: 0.62. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Fabaceae/Juglandaceae, Carya 0.62 −2.5095 2.6175 106 13 dbh 3–70 0.81
Juglandaceae C. ovata Hickory, shagbark 407 0.64
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–70 cm
- R²
- 0.81
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 106 pseudodata points generated from 13 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
598
Aboveground biomass (kg)
281
Carbon (kg), ×0.47
1,030
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 | 598 | 598 | Computed from the printed form computed from the published form at dbh = 30 cm |
Related
- Canadian national equation, hickory, dbh and height (sum of wood, bark, branches, foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- Canadian national equation, hickory, dbh only (sum of wood, bark, branches, foliage; Table 3) · Lambert et al. 2005 · DBH
- NSVB bitternut hickory, species-level (all ecodivisions): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
- NSVB pignut hickory, species-level (all ecodivisions): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
- NSVB hickory spp., Subtropical Division (230): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
- NSVB hickory spp., species-level (all ecodivisions): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
- NSVB hickory spp., Hot Continental Regime Mountains (M220): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
- 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