Tree Allometrics

Equations / Branch biomass

Quercus branch biomass (wood and bark)

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

As printed (Table 2, p. 12)

0.0502d1.97638h0.34229

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

Branch biomass = 0.0502 * D^1.97638 * H^0.34229
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. Group equation for all species of the genus in the study; fit ranges not printed for the group.

Source
branches (including both wood and bark)
Output · Section 2.2
R2 0.57 (cross-validation)
R² · Table 2, p. 12
R²
0.57
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
43.8
Branch biomass (kg)
20.6
Carbon (kg), ×0.47
75.5
CO₂e (kg), ×44/12
050100150200510152025303540DBH (cm)Branch biomass (kg)Branch 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 = 1243.843.8Computed from the printed form
computed from the Table 2 equation
D = 35, H = 18152152Computed from the printed form
computed from the Table 2 equation

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