Tree Allometrics

Betula papyrifera / Aboveground biomass

Paper birch total aboveground biomass from DBH (Table 4)

Aboveground biomassBetula papyrifera · BetulaceaeUnited StatesmixedRead from the original paper
Photo of Betula papyrifera
Dezene Huber · CC0 · iNaturalist
Equation

As printed (Table 4, species row and table note)

Paper birch a, b, c, d, CF: −2.5782 2.5299 CF 1.0179; model form exp(a + bX1)

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

Aboveground biomass = 1.0179 * exp(-2.5782 + 2.5299 * ln(D))
D
Diameter at breast height (1.3 m), cm

AGB is total aboveground live-tree biomass (stem, bark, branches, foliage). X1 = ln(DBH), X2 = ln(HT), DBH in cm and HT in m. Species identified from the common name in Table 4 (scientific name added from the standard species symbol). Stand type is not stated. Observed ranges in Table 1 cover all trees of the species used.

Source
Paper birch ... n 23
Trees measured · Table 1
Paper birch DBH min 4.7 max 30.6; HT min 5.6 max 21.9
Smallest DBH · Table 1
Trees measured
23
DBH range
4.7–30.6 cm
Height range
5.6–21.9 m
Correction factor
1.0179 (applied)
Method
regression on ln(AGB) with Baskerville log-bias correction factor
Where
Western U.S.A., legacy destructive-sampling biomass collection (Radtke et al. 2015)
Last checked
2026-11-02
Calculate
73
Aboveground biomass (kg)
34.3
Carbon (kg), ×0.47
126
CO₂e (kg), ×44/12
Fitted DBH range02004006008001,000510152025303540DBH (cm)Aboveground biomass (kg)Aboveground 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 = 157373Computed from the printed form
computed from the Table 4 coefficients
D = 35623623Computed from the printed form
computed from the Table 4 coefficients

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