Tree Allometrics

Pinus engelmannii / Branch biomass

Pinus engelmannii branch biomass (wood and bark)

Branch biomassPinus engelmannii · PinaceaeMexiconaturalRead from the original paper
Photo of Pinus engelmannii
© CK2AZ · CC BY · iNaturalist
Equation

As printed (Table 2, p. 12)

1.39092d1.25795h0.05199

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

Branch biomass = 1.39092 * D^1.25795 * H^0.05199
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 0.59 (cross-validation)
R² · Table 2, p. 12
(89)
Trees measured · Table 1
Trees measured
89
DBH range
6.5–51.8 cm
Height range
3.8–27.8 m
R²
0.59
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
68.6
Branch biomass (kg)
32.2
Carbon (kg), ×0.47
118
CO₂e (kg), ×44/12
Fitted DBH range050100150200510152025303540DBH (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 = 1268.668.6Computed from the printed form
computed from the Table 2 equation
D = 35, H = 18142142Computed from the printed form
computed from the Table 2 equation

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