# Quercus crassifolia total aboveground biomass

Aboveground biomass equation for Quercus crassifolia, Mexico, from Vargas-Larreta et al. 2017. 108 trees, DBH 8.5–43.1 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Vargas-Larreta et al. 2017 (Table 2, p. 12):

> Wt = ΣWi

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#equation

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

```
Aboveground biomass = (0.02542 * D^2 * H) + (0.00305 * D^2 * H) + (0.01113 * D^2 * H) + (0.00165 * D^2 * H)
```

Inputs: D = Diameter at breast height (1.3 m) (cm); H = Total tree height (m).
The source's own form: (0.02542 * d^2 * h) + (0.00305 * d^2 * h) + (0.01113 * d^2 * h) + (0.00165 * d^2 * h), with d in cm, h in m; output in kg.
Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Quercus crassifolia (species), family Fagaceae; broadleaf
- Where: Durango, Sierra Madre Occidental. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#where
- Biomes: temperate, montane
- Stand: natural
- Trees measured: 108. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#n_trees
- DBH range: 8.5–43.1 cm. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#dbh
- Height range: 6–18.8 m. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#height
- R²: 0.91. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#r2
- Method: Power-law component equations fitted simultaneously by generalized method of moments (additive system). Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#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

Vargas-Larreta, B., López-Sánchez, C.A., Corral-Rivas, J.J., et al. (2017). Allometric Equations for Estimating Biomass and Carbon Stocks in the Temperate Forests of North-Western Mexico. Forests, 8(8), 269.

- DOI: https://doi.org/10.3390/f8080269
- Access: open access
- Copy we read: https://www.mdpi.com/1999-4907/8/8/269
- Every equation from this source: https://treeallometry.org/sources/vargas-larreta-2017/
- Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#source

## The facts, in the source's words

**Equation** (Table 2, p. 12):

> Wt = ΣWi

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#equation

**Equation** (Table 2, p. 12):

> 0.02542d2h

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-expression

**Equation** (Table 2, p. 12):

> 0.00305d2h

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-expression-2

**Equation** (Table 2, p. 12):

> 0.01113d2h

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-expression-3

**Equation** (Table 2, p. 12):

> 0.00165d2h

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-expression-4

**Output** (Section 2.3.1):

> Wt is the total tree AGB (i.e., the sum of all the tree biomass components)

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-output

**R²** (Table 2, p. 12):

> R2 0.91 (cross-validation)

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-fit-r2

**Trees measured** (Table 1):

> (108)

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#quote-fit-n-trees

**Our note:** Equation as printed in the Table 2 system for this taxon; d is DBH in cm, h total height in m, output in kg dry mass. R² is the 10-fold cross-validation value. Total AGB is printed as Wt = sum of the four components (stem wood, stem bark, branches, foliage); the expression is that sum of the four printed equations.

## 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 = 20, H = 12 | 198 | 198 | Computed from the printed form: computed from the Table 2 equations (sum of the four components) |
| D = 35, H = 18 | 910 | 910 | Computed from the printed form: computed from the Table 2 equations (sum of the four components) |

Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/#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: Vargas-Larreta, B., López-Sánchez, C.A., Corral-Rivas, J.J., et al. (2017). Allometric Equations for Estimating Biomass and Carbon Stocks in the Temperate Forests of North-Western Mexico. Forests, 8(8), 269. https://doi.org/10.3390/f8080269

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Quercus crassifolia total aboveground biomass", checked 2026-11-02, https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/. 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/vargas-larreta-2017-q-crassifolia-agb.json
Report a problem: email info@restorationscope.com with the equation id (vargas-larreta-2017-q-crassifolia-agb) and where the right value appears.