Tree Allometrics

Equations / Branch biomass

Quercus rugosa branch biomass (wood and bark)

Branch biomassQuercus rugosa · FagaceaeMexiconaturalRead from the original paper
Photo of Quercus rugosa
© Neptalí Ramírez Marcial · CC BY · iNaturalist
Equation

As printed (Table 2, p. 12)

0.11276d1.52164h0.53343

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

Branch biomass = 0.11276 * D^1.52164 * H^0.53343
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.

Source
branches (including both wood and bark)
Output · Section 2.2
R2 0.86 (cross-validation)
R² · Table 2, p. 12
(61)
Trees measured · Table 1
Trees measured
61
DBH range
9.3–41.3 cm
Height range
3.3–20.2 m
R²
0.86
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
40.51
Branch biomass (kg)
19.04
Carbon (kg), ×0.47
69.81
CO₂e (kg), ×44/12
Fitted DBH range020406080100120510152025303540DBH (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 = 1240.540.5Computed from the printed form
computed from the Table 2 equation
D = 35, H = 18117.8117.8Computed from the printed form
computed from the Table 2 equation

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