# Pinus oocarpa, power model, D only (model 1)

Aboveground biomass equation for Pinus oocarpa Schiede, Mexico, from Navarro-Martínez et al. 2020. 33 trees, DBH 12.5–82 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Navarro-Martínez et al. 2020 (Table 4, model 1):

> B̂i = 0.10012 * D^2.4589

Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#equation

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

```
Aboveground biomass = 0.10012 * D^2.4589
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.10012 * D^2.4589, with D in cm; output in kg.
Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Pinus oocarpa Schiede (species), family Pinaceae; conifer
- Where: Microcuenca del río Hueyapa, Guerrero (bosque templado). Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#where
- Biomes: temperate
- Stand: natural
- Trees measured: 33. Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#n_trees
- DBH range: 12.5–82 cm. Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#dbh
- Height range: 7.15–29.1 m. Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#height
- Method: Power model fitted as log-linear regression (Table 3, models 1-2); no correction factor stated. Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#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

Navarro-Martínez, J., Godínez-Jaimes, F., López-López, M. Á., Rosas-Acevedo, J. L., Juárez-López, A. L., & Reyes-Umaña, M. (2020). Ajuste de ecuaciones alométricas para estimar biomasa aérea en Pinus oocarpa y Quercus resinosa en Guerrero, México. Madera y Bosques, 26(1), e2611964.

- DOI: https://doi.org/10.21829/myb.2020.2611964
- Access: open access
- Copy we read: https://myb.ojs.inecol.mx/index.php/myb/article/download/e2611964/2039
- Every equation from this source: https://treeallometry.org/sources/navarro-2020/
- Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#source

## The facts, in the source's words

**Equation** (Table 4, model 1):

> B̂i = 0.10012 * D^2.4589

Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#equation

**Trees measured** (Resumen / Table 2):

> 33 árboles

Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#quote-fit-n-trees

**Our note:** The authors recommend this model for P. oocarpa (p. 8). R2adj 0.977. Total aboveground biomass (stem, branches, foliage, cones). No back-transformation correction factor is stated, none applied.

## 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 = 33.3 | 555 | 555 | Computed from the printed form: computed from the published form |
| D = 61.1 | 2,467 | 2,467 | Computed from the printed form: computed from the published form |

Cite: https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/#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: Navarro-Martínez, J., Godínez-Jaimes, F., López-López, M. Á., Rosas-Acevedo, J. L., Juárez-López, A. L., & Reyes-Umaña, M. (2020). Ajuste de ecuaciones alométricas para estimar biomasa aérea en Pinus oocarpa y Quercus resinosa en Guerrero, México. Madera y Bosques, 26(1), e2611964. https://doi.org/10.21829/myb.2020.2611964

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Pinus oocarpa, power model, D only (model 1)", checked 2026-11-02, https://treeallometry.org/equations/navarro-2020-p-oocarpa-m1/. 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/navarro-2020-p-oocarpa-m1.json
Report a problem: email info@restorationscope.com with the equation id (navarro-2020-p-oocarpa-m1) and where the right value appears.