# Quercus sideroxyla total aboveground biomass Aboveground biomass equation for Quercus sideroxyla, Mexico, from Vargas-Larreta et al. 2017. 123 trees, DBH 11–57 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-sideroxyla-agb/#equation In this library's units, ready to compute (aboveground biomass in kg): ``` Aboveground biomass = (0.033462 * D^1.739234 * H^1.111268) + (0.03022 * D^1.66927 * H^0.80238) + (0.005154 * D^1.92033 * H^1.06618) + (0.00092 * D^1.57684 * H^1.34236) ``` Inputs: D = Diameter at breast height (1.3 m) (cm); H = Total tree height (m). The source's own form: (0.033462 * d^1.739234 * h^1.111268) + (0.03022 * d^1.66927 * h^0.80238) + (0.005154 * d^1.92033 * h^1.06618) + (0.00092 * d^1.57684 * h^1.34236), with d in cm, h in m; output in kg. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#canonical ## What it covers - Output: Aboveground biomass, kg - Taxon: Quercus sideroxyla (species), family Fagaceae; broadleaf - Where: Durango, Sierra Madre Occidental. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#where - Biomes: temperate, montane - Stand: natural - Trees measured: 123. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#n_trees - DBH range: 11–57 cm. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#dbh - Height range: 6.3–24.8 m. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#height - R²: 0.92. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-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-sideroxyla-agb/#method - Verification: read in the original source - Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-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-sideroxyla-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-sideroxyla-agb/#equation **Equation** (Table 2, p. 12): > 0.033462d1.739234h1.111268 Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#quote-expression **Equation** (Table 2, p. 12): > 0.03022d1.66927h0.80238 Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#quote-expression-2 **Equation** (Table 2, p. 12): > 0.005154d1.92033h1.06618 Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#quote-expression-3 **Equation** (Table 2, p. 12): > 0.00092d1.57684h1.34236 Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-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-sideroxyla-agb/#quote-output **R²** (Table 2, p. 12): > R2 0.92 (cross-validation) Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-agb/#quote-fit-r2 **Trees measured** (Table 1): > (123) Cite: https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-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 | 156 | 156 | Computed from the printed form: computed from the Table 2 equations (sum of the four components) | | D = 35, H = 18 | 635 | 635 | 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-sideroxyla-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 sideroxyla total aboveground biomass", checked 2026-11-02, https://treeallometry.org/equations/vargas-larreta-2017-q-sideroxyla-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-sideroxyla-agb.json Report a problem: email info@restorationscope.com with the equation id (vargas-larreta-2017-q-sideroxyla-agb) and where the right value appears.