Tree Allometrics

Juniperus virginiana / Foliage biomass

Canadian national equation, eastern redcedar, dbh and height (foliage; Table 4)

Foliage biomassJuniperus virginiana · CupressaceaeCanadaRead from the original paper
Photo of Juniperus virginiana
© Douglas Goldman · CC BY-SA · iNaturalist
Equation

As printed (Eq. 3)

y foliage = β foliage1D βfoliage2Hβfoliage3 + efoliage

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

Foliage biomass = 0.2575 * D^2.5136 * H^(-1.5565)
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

Foliage is leaves and twigs. r2 is the adjusted R² (AdjRSq) of this compartment in Table 5. Fitted on the original scale (weighted nonlinear seemingly unrelated regression), so there is no back-transform correction. Dead branches, cones and fruits are not part of aboveground biomass in this work (Materials). Stand type was not always recorded. Ung, Bernier & Guo (2008) later revised parameters for some species with British Columbia data; not used here.

Source
bfoliage1 0.2575
Equation · Table 4, Eastern redcedar
bfoliage2 2.5136
Equation · Table 4, Eastern redcedar
bfoliage3 –1.5565
Equation · Table 4, Eastern redcedar
Eastern redcedar 33 12.3±1.4 7.2±0.4 52.7±12.3
Trees measured · Table 2 (No. of trees)
(2.0;38.2) (2.7;12.8) (1.4;316.4)
Smallest DBH · Table 2, Eastern redcedar (ranges of dbh, height, total biomass)
Foliage 0.0120 0.81 5.3 2.70 0.1601 0.81 5.3 1.69
R² · Table 5, Eastern redcedar (AdjRSq in the dbh- and height-based set, second block)
Trees measured
33
DBH range
2–38.2 cm
Height range
2.7–12.8 m
R²
0.81
Method
Nonlinear seemingly unrelated regression with weight functions; additivity constrained so compartments sum to total
Where
Ontario, Canada (ENFOR archival data, early 1980s)
Last checked
2026-11-03
Calculate
Height from
7.09
Foliage biomass (kg)
3.33
Carbon (kg), ×0.47
12.2
CO₂e (kg), ×44/12

Outside the data this model was fitted on: height above the fitted 12.8 m. Results may be unreliable.

Fitted DBH range01020304050510152025303540DBH (cm)Foliage biomass (kg)Foliage 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 = 157.097.09Computed from the printed form
computed from the published form at dbh = 20 cm, H = 15 m

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