Tree Allometrics

Equations / Aboveground biomass

Dipterocarpus genus, Vietnam, AGB from D (D1, Eq. 18)

Aboveground biomassDipterocarpus · DipterocarpaceaeVietnamnaturalRead from the original paper
Covers the whole genus
Equation

As printed (Eq. 18, p. 11)

Dipterocarpus : AGB = 0.03713 × DBH2.73813

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

Aboveground biomass = 0.03713 * D^2.73813
D
Diameter at breast height (1.3 m), cm

AGB is the sum of stem, branch and foliage dry mass. Fitted on the whole dataset with the fixed-effects model; the random ecoregion effect was not retained. No correction factor is stated.

Source
n 94 (Dipterocarpus Genus)
Trees measured · Table 2
Trees measured
94
DBH range
4.9–48.8 cm
Height range
3.8–23.5 m
Method
nonlinear weighted least squares (power variance function)
Where
Dipterocarp forests, Central Highlands and Southeast ecoregions, Vietnam
Last checked
2026-11-02
Calculate
20.32
Aboveground biomass (kg)
9.549
Carbon (kg), ×0.47
35.01
CO₂e (kg), ×44/12
Fitted DBH range02004006008001,000510152025303540DBH (cm)Aboveground biomass (kg)Aboveground biomass

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%.

InputsExpectedWe getFrom
D = 1020.320.3Computed from the printed form
computed from the published form (coefficients as printed)
D = 20135.6135.6Computed from the printed form
computed from the published form (coefficients as printed)
D = 40904.4904.4Computed from the printed form
computed from the published form (coefficients as printed)

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