# Areca palm (pinang) AGB from DBH

Aboveground biomass equation for Areca catechu, Indonesia, from Prayogo et al. 2018. 9 trees. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Prayogo et al. 2018 (Results and Discussion, p. 385):

> TDW (AGB) = 0.0689 D 2.5977 (R² = 0.74)

Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#equation

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

```
Aboveground biomass = 0.0689 * D^2.5977
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.0689 * D^2.5977, with D in cm; output in kg.
Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Areca catechu (species), family Arecaceae; palm
- Where: Wambena village, Depapre, Jayapura, Papua. Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#where
- Biomes: tropical
- Stand: agroforestry
- Trees measured: 9. Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#n_trees
- R²: 0.74. Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#r2
- Method: power regression. Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#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

Prayogo, C., Sari, R. R., Asmara, D. H., Rahayu, S., & Hairiah, K. (2018). Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks. AGRIVITA Journal of Agricultural Science, 40(3), 381–389.

- DOI: https://doi.org/10.17503/agrivita.v40i3.1124
- Access: open access
- Copy we read: https://agrivita.ub.ac.id/index.php/agrivita/article/download/1124/985
- Every equation from this source: https://treeallometry.org/sources/prayogo-2018/
- Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#source

## The facts, in the source's words

**Equation** (Results and Discussion, p. 385):

> TDW (AGB) = 0.0689 D 2.5977 (R² = 0.74)

Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#equation

**Trees measured** (Materials and Methods):

> A total of 9 palms were measured

Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#quote-fit-n-trees

**Our note:** D is stem diameter at 1.3 m (D1.3, called DBH in Fig. 4). AGB = stem (WBT) plus leaf dry weight, fruit and flowers taken into account; kg dry mass. Palms sampled in classes of <6, 6-9, 9-11 and >11 cm DBH (3 per class); exact min and max not printed. The two height equations (AGB = 0.8164 H^1.4202 and AGB = 0.03883*H*D^1.2) are left out because the paper calls H both total plant height and stem height.

## 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 = 6 | 7.24 | 7.24 | Computed from the printed form: hand-computed from the published form |
| D = 9 | 20.8 | 20.8 | Computed from the printed form: hand-computed from the published form |
| D = 11 | 34.9 | 34.9 | Computed from the printed form: hand-computed from the published form |

Cite: https://treeallometry.org/equations/prayogo-2018-dbh/#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: Prayogo, C., Sari, R. R., Asmara, D. H., Rahayu, S., & Hairiah, K. (2018). Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks. AGRIVITA Journal of Agricultural Science, 40(3), 381–389. https://doi.org/10.17503/agrivita.v40i3.1124

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Areca palm (pinang) AGB from DBH", checked 2026-11-02, https://treeallometry.org/equations/prayogo-2018-dbh/. 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/prayogo-2018-dbh.json
Report a problem: email info@restorationscope.com with the equation id (prayogo-2018-dbh) and where the right value appears.