Juniperus virginiana / Branch biomass

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

Branch biomassJuniperus virginiana · CupressaceaeCanadaRead from the original paper

Equation

As printed (Eq. 3)

y branches = β branches1D βbranches2Hβbranches3 + e branches

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

Branch biomass = 0.0219 * D^2.3585

D: Diameter at breast height (1.3 m), cm

All branches, cut at the stem base (live branches; dead branches excluded). Height drops out of the branches term: the paper leaves its height exponent blank (—, not significantly different from zero). 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

Lambert, M.-C., Ung, C.-H., Raulier, F. (2005). Canadian national tree aboveground biomass equations. Canadian Journal of Forest Research, 35(8), 1996–2018.

doi:10.1139/x05-112 · Paywalled · copy we read

bbranches1 0.0219

Equation · Table 4, Eastern redcedar

bbranches2 2.3585

Equation · Table 4, Eastern redcedar

bbranches3 —

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)

Branches 0.0152 0.81 10.3 2.92 0.0135 0.81 10.5 2.94

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

DBH (cm)

25.6

Branch biomass (kg)

12.1

Carbon (kg), ×0.47

44.2

CO₂e (kg), ×44/12

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%.

Inputs	Expected	We get	From
D = 20, H = 15	25.6	25.6	Computed from the printed form computed from the published form at dbh = 20 cm, H = 15 m

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Canadian national equation, alpine fir, dbh and height (stem wood plus stem bark; Table 4) · same paper · Stem biomass
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Compare these curves

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

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