Abies concolor / Aboveground biomass

White fir total aboveground biomass from DBH (Table 4)

Aboveground biomassAbies concolor · PinaceaeUnited StatesmixedRead from the original paper

Equation

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

White fir a, b, c, d, CF: −1.5759 2.2315 CF 1.0089; model form exp(a + bX1)

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

Aboveground biomass = 1.0089 * exp(-1.5759 + 2.2315 * 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

Poudel, K. P., Temesgen, H., Radtke, P. J., & Gray, A. N. (2019). Estimating individual-tree aboveground biomass of tree species in the western U.S.A. Canadian Journal of Forest Research, 49(6), 701-714.

doi:10.1139/cjfr-2018-0361 · Open access · copy we read

White fir ... n 10

Trees measured · Table 1

White fir DBH min 28.4 max 66.5; HT min 17.7 max 39.7

Smallest DBH · Table 1

Trees measured: 10
DBH range: 28.4–66.5 cm
Height range: 17.7–39.7 m
Correction factor: 1.0089 (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

DBH (cm)

87.9

Aboveground biomass (kg)

41.3

Carbon (kg), ×0.47

151

CO₂e (kg), ×44/12

Outside the data this model was fitted on: DBH below the fitted 28.4 cm. Results may be unreliable.

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 = 15	87.9	87.9	Computed from the printed form computed from the Table 4 coefficients
D = 35	582	582	Computed from the printed form computed from the Table 4 coefficients

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Compare these curves

White fir total aboveground biomass from DBH (Table 4)

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