Equations / Aboveground biomass

North American taxa group: Betulaceae 0.40–0.49 spg (Table 5)

Aboveground biomassBetulaceae 0.40–0.49 spg (Betula papyrifera, B. populifolia) · BetulaceaeUnited StatesmixedRead from the original paper

Equation

As printed (Table 5 caption, p. 140)

ln(biomass) = β0 + β1 ln(diameter)

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

Aboveground biomass = exp(-2.2271 + 2.4513 * ln(D))

Paper and gray birch. Median specific gravity of the group: 0.47. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.

Source

Betulaceae 0.40–0.49 spg 0.47 −2.2271 2.4513 145 29 dbh 3–51 0.81

Equation · Table 5 row, p. 140

Betulaceae Betula papyrifera Birch, paper 375 0.48

Taxon · Table 3, p. 136

we did not include a correction (Baskerville, 1972) for underestimation

Correction factor · Methods, p. 139

DBH range: 3–51 cm
R²: 0.81
Method: Weighted regression of ln(biomass) on ln(dbh) fitted to 145 pseudodata points generated from 29 published equations; no back-transform correction
Where: United States (equations compiled from US and Canadian studies)
Last checked: 2026-11-03

Calculate

DBH (cm)

450

Aboveground biomass (kg)

212

Carbon (kg), ×0.47

776

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 = 30	450	450	Computed from the printed form computed from the published form at dbh = 30 cm

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