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

Aboveground biomass equation for Dipterocarpus, Vietnam, from Huy et al. 2016. 94 trees, DBH 4.9–48.8 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Huy et al. 2016 (Eq. 18, p. 11):

> Dipterocarpus : AGB = 0.03713 × DBH2.73813

Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#equation

In this library's units, ready to compute (aboveground biomass in kg):

```
Aboveground biomass = 0.03713 * D^2.73813
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.03713 * DBH^2.73813, with DBH in cm; output in kg.
Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Dipterocarpus (genus), family Dipterocarpaceae; broadleaf
- Where: Dipterocarp forests, Central Highlands and Southeast ecoregions, Vietnam. Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#where
- Biomes: tropical
- Stand: natural
- Trees measured: 94. Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#n_trees
- DBH range: 4.9–48.8 cm. Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#dbh
- Height range: 3.8–23.5 m. Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#height
- Method: nonlinear weighted least squares (power variance function). Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#checked_at

A missing fit statistic is one the source doesn't state, or that we haven't recorded; it is never estimated. Outside the stated DBH range or region, the equation is an extrapolation.

## Source

Huy, B., Poudel, K. P., Kralicek, K., Hung, N. D., Khoa, P. V., Phuong, V. T., & Temesgen, H. (2016). Allometric Equations for Estimating Tree Aboveground Biomass in Tropical Dipterocarp Forests of Vietnam. Forests, 7(8), 180.

- DOI: https://doi.org/10.3390/f7080180
- Access: open access
- Copy we read: https://www.mdpi.com/1999-4907/7/8/180/htm
- Every equation from this source: https://treeallometry.org/sources/huy-2016/
- Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#source

## The facts, in the source's words

**Equation** (Eq. 18, p. 11):

> Dipterocarpus : AGB = 0.03713 × DBH2.73813

Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#equation

**Trees measured** (Table 2):

> n 94 (Dipterocarpus Genus)

Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#quote-fit-n-trees

**Our note:** 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.

## Checks this equation passes

On every build, the library's form and the source's own form (in its units) must both give these values within 1%.

| Inputs | Expected | We get | From |
| --- | --- | --- | --- |
| D = 10 | 20.3 | 20.3 | Computed from the printed form: computed from the published form (coefficients as printed) |
| D = 20 | 135.6 | 135.6 | Computed from the printed form: computed from the published form (coefficients as printed) |
| D = 40 | 904.4 | 904.4 | Computed from the printed form: computed from the published form (coefficients as printed) |

Cite: https://treeallometry.org/equations/huy-2016-dipterocarpus-d/#checks

The calculator on the page shows carbon as biomass × 0.47 (IPCC 2006 Guidelines, Vol. 4, Ch. 4, Table 4.3) and CO₂e as carbon × 44/12.

## How to cite

Cite the source for the equation: Huy, B., Poudel, K. P., Kralicek, K., Hung, N. D., Khoa, P. V., Phuong, V. T., & Temesgen, H. (2016). Allometric Equations for Estimating Tree Aboveground Biomass in Tropical Dipterocarp Forests of Vietnam. Forests, 7(8), 180. https://doi.org/10.3390/f7080180

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Dipterocarpus genus, Vietnam, AGB from D (D1, Eq. 18)", checked 2026-11-02, https://treeallometry.org/equations/huy-2016-dipterocarpus-d/. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Quotes are the authors' words.

Data for this equation: https://treeallometry.org/data/equations/huy-2016-dipterocarpus-d.json
Report a problem: email info@restorationscope.com with the equation id (huy-2016-dipterocarpus-d) and where the right value appears.