Tree Allometrics

Equations / Aboveground biomass

Six Guanajuato oaks pooled, total aboveground biomass fitted directly (model 4)

Aboveground biomassQuercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans) · FagaceaeMexiconaturalRead from the original paper

Fitted on these 6 species: Quercus rugosa, Quercus obtusata, Quercus sideroxyla, Quercus coccolobifolia, Quercus laurina, Quercus candicans

4 of the 6 species it was fitted on · iNaturalist photos, hover for credit
Equation

As printed (Table 6, model 4)

Bt = 0.057707 × (ρDn² × At)^0.989101

In this library's units, ready to compute (kg)

Aboveground biomass = 0.057707 * (rho * D^2 * H)^0.989101
rho
Wood density (oven-dry mass / green volume), g/cm³
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

Dn and At are diameter at breast height and total height (At measured after felling, stump height included). Adjusted R2 (not stored): 0.9577. Wood density rho from drying at 70 °C (g cm–3).

Source
Un total de 165 árboles
Trees measured · Methods / Table 1
Trees measured
165
DBH range
4.8–48.6 cm
Height range
3.55–20.6 m
Method
Total biomass fitted directly (not as a sum of components)
Where
Sierra de Santa Rosa, Guanajuato (bosques de encino)
Last checked
2026-11-02
Calculate
Height from
104
Aboveground biomass (kg)
48.7
Carbon (kg), ×0.47
179
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600510152025303540DBH (cm)Aboveground biomass (kg)Aboveground biomass

Shaded: the DBH range the model was fitted on. Other inputs held at the values above.

Checks this equation passes

On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.

InputsExpectedWe getFrom
D = 17.9, H = 8.7, rho = 0.7104104Computed from the printed form
computed from the published form (Table 6)
D = 35.5, H = 15.5, rho = 0.8812812Computed from the printed form
computed from the published form (Table 6)

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