Tree Allometrics

Equations / Aboveground biomass

Quercus total aboveground biomass

Aboveground biomassQuercus · FagaceaeMexiconaturalRead from the original paper
Covers the whole genus
Equation

As printed (Table 2, p. 12)

Wt = ΣWi

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

Aboveground biomass = (0.11618 * D^1.77395 * H^0.68708) + (0.00827 * D^2.54589) + (0.0502 * D^1.97638 * H^0.34229) + (0.08234 * D^1.59396)
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

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. Group equation for all species of the genus in the study; fit ranges not printed for the group.

Source
0.11618d1.77395h0.68708
Equation · Table 2, p. 12
0.00827d2.54589
Equation · Table 2, p. 12
0.0502d1.97638h0.34229
Equation · Table 2, p. 12
0.08234d1.59396
Equation · Table 2, p. 12
Wt is the total tree AGB (i.e., the sum of all the tree biomass components)
Output · Section 2.3.1
R2 0.82 (cross-validation)
R² · Table 2, p. 12
R²
0.82
Method
Power-law component equations fitted simultaneously by generalized method of moments (additive system)
Where
Durango, Sierra Madre Occidental
Last checked
2026-11-02
Calculate
Height from
201
Aboveground biomass (kg)
94.3
Carbon (kg), ×0.47
346
CO₂e (kg), ×44/12
0100200300400500600700800510152025303540DBH (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 = 20, H = 12201201Computed from the printed form
computed from the Table 2 equations (sum of the four components)
D = 35, H = 18711711Computed from the printed form
computed from the Table 2 equations (sum of the four components)

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