Corymbia citriodora / Aboveground biomass

Spotted gum AGB from D²H (Eq. 6)

Aboveground biomassCorymbia citriodora subsp. variegata · MyrtaceaeAustraliaplantationRead from the original paper

Photo of Corymbia citriodora subsp. variegata

Equation

As printed (Table 4, Eq. (6); form in Table 2)

(6) 0.02533 1.00656 for AGB = α × (D2H)β

In this library's units, ready to compute (kg)

Aboveground biomass = 0.02533 * (D^2 * H)^1.00656

D: Diameter at breast height (1.3 m), cm
H: Total tree height, m

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.

Source

Huynh, T., Lewis, T., Applegate, G., Pachas, A. N. A., & Lee, D. J. (2022). Allometric Equations to Estimate Aboveground Biomass in Spotted Gum (Corymbia citriodora Subspecies variegata) Plantations in Queensland. Forests, 13(3), 486.

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 · Abstract

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

DBH (cm)Height (m)

Height from

96.2

Aboveground biomass (kg)

45.2

Carbon (kg), ×0.47

166

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	96.2	96.2	Computed from the printed form computed from the Table 4 parameter estimates
D = 30, H = 27	658	658	Computed from the printed form computed from the Table 4 parameter estimates

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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 D, H and wood density (Eq. 8) · Huynh et al. 2022 · DBH + Height + Wood density
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 D, H and wood density (Eq. 8) · same paper · Aboveground biomass

Compare these curves

Spotted gum AGB from D²H (Eq. 6)

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