# Pinus douglasiana and Pinus michoacana total aboveground biomass Aboveground biomass equation for Pinus douglasiana and Pinus michoacana (data combined), Mexico, from Vargas-Larreta et al. 2017. 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-p-douglasiana-michoacana-agb/#equation In this library's units, ready to compute (aboveground biomass in kg): ``` Aboveground biomass = (0.11997 * D^2.34448) + (0.03126 * D^1.978201) + (0.014982 * D^2.40887) + (0.01168 * D^2.148631) ``` Inputs: D = Diameter at breast height (1.3 m) (cm). The source's own form: (0.11997 * d^2.34448) + (0.03126 * d^1.978201) + (0.014982 * d^2.40887) + (0.01168 * d^2.148631), with d in cm; output in kg. Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#canonical ## What it covers - Output: Aboveground biomass, kg - Taxon: Pinus douglasiana and Pinus michoacana (data combined) (mixed species), family Pinaceae; conifer - Where: Durango, Sierra Madre Occidental. Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#where - Biomes: temperate, montane - Stand: natural - R²: 0.91. Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#r2 - Method: Power-law component equations fitted simultaneously by generalized method of moments (additive system). Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#method - Verification: read in the original source - Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-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-p-douglasiana-michoacana-agb/#source ## The facts, in the source's words **Equation** (Table 2, p. 12): > Wt = ΣWi Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#equation **Equation** (Table 2, p. 12): > 0.11997d2.34448 Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#quote-expression **Equation** (Table 2, p. 12): > 0.03126d1.978201 Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#quote-expression-2 **Equation** (Table 2, p. 12): > 0.014982d2.40887 Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#quote-expression-3 **Equation** (Table 2, p. 12): > 0.01168d2.148631 Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-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-p-douglasiana-michoacana-agb/#quote-output **R²** (Table 2, p. 12): > R2 0.91 (cross-validation) Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-agb/#quote-fit-r2 **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. Data of the two species were combined by the authors; fit ranges not printed for the combined set. ## 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 | 174.1 | 174.1 | Computed from the printed form: computed from the Table 2 equations (sum of the four components) | | D = 35 | 638.4 | 638.4 | Computed from the printed form: computed from the Table 2 equations (sum of the four components) | Cite: https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-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), "Pinus douglasiana and Pinus michoacana total aboveground biomass", checked 2026-11-02, https://treeallometry.org/equations/vargas-larreta-2017-p-douglasiana-michoacana-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-p-douglasiana-michoacana-agb.json Report a problem: email info@restorationscope.com with the equation id (vargas-larreta-2017-p-douglasiana-michoacana-agb) and where the right value appears.