Equations / Aboveground biomass
Spotted gum AGB from D, H and wood density (Eq. 8)
Aboveground biomassCorymbia citriodora subsp. variegata · MyrtaceaeAustraliaplantationRead from the original paper
© Greg Tasney · CC BY-SA · iNaturalistEquation
As printed (Table 4, Eq. (8); form in Table 2)
(8) 0.00233 2.42585 0.30576 0.49890 for AGB = α × Dβ × Hβ1 × ρβ2
In this library's units, ready to compute (kg)
Aboveground biomass = 0.00233 * D^2.42585 * H^0.30576 * (rho * 1000)^0.4989D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
rho- Wood density (oven-dry mass / green volume), g/cm³
Weighted nonlinear power model, so no back-transform correction applies. AGB is the total of stem, bark, large branches, small branches and leaves (Table 3), so foliage is included. Adjusted R² is printed in Table 4 but is not stored. Wood density ρ is in kg m-3 in the paper, converted to g/cm3 in the canonical form.
Source
doi:10.3390/f13030486 · Open access · copy we read
We destructively sampled and weighed 52 sample trees, ranging from 11.8 to 42.0 cm in diameter at breast height
- Trees measured
- 52
- DBH range
- 11.8–42 cm
- Height range
- 12.6–32 m
- Method
- weighted nonlinear regression (nlme)
- Where
- Three plantation trials (451D, 451G, 13PHY), southeast Queensland
- Last checked
- 2026-11-02
Calculate
Height from
101.9
Aboveground biomass (kg)
47.87
Carbon (kg), ×0.47
175.5
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 = 15, H = 16, rho = 0.7 | 101.9 | 101.9 | Computed from the printed form computed from the Table 4 parameter estimates |
| D = 30, H = 27, rho = 0.73 | 655.8 | 655.8 | Computed from the printed form computed from the Table 4 parameter estimates |
Related
- Spotted gum AGB from DBH, 40-tree dataset (Eq. 10) · Huynh et al. 2022 · DBH
- Spotted gum AGB from DBH (Eq. 3) · Huynh et al. 2022 · DBH
- Spotted gum AGB from D and H (Eq. 5) · Huynh et al. 2022 · DBH + Height
- Spotted gum AGB from D²H (Eq. 6) · Huynh et al. 2022 · DBH + Height
- Spotted gum AGB from DBH, 40-tree dataset (Eq. 10) · same paper · Aboveground biomass
- Spotted gum AGB from DBH (Eq. 3) · same paper · Aboveground biomass
- Spotted gum AGB from D and H (Eq. 5) · same paper · Aboveground biomass
- Spotted gum AGB from D²H (Eq. 6) · same paper · Aboveground biomass