Equations / Aboveground biomass

North American taxa group: Salicaceae < 0.35 spg (Table 5)

Aboveground biomassSalicaceae · SalicaceaeUnited StatesmixedRead from the original paper

Covers the whole family

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(-2.6863 + 2.4561 * ln(D))

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

Low-specific-gravity poplars (balsam poplar, black cottonwood). The authors set hybrid poplar specific gravity at 0.34, which places hybrid poplar in this group. Median specific gravity of the group: 0.31. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.

Source

Chojnacky, D.C., Heath, L.S., Jenkins, J.C. (2014). Updated generalized biomass equations for North American tree species. Forestry, 87(1), 129–151.

doi:10.1093/forestry/cpt053 · Open access · copy we read

Salicaceae < 0.35 spg 0.31 −2.6863 2.4561 64 10 dbh 3–53 0.81

Equation · Table 5 row, p. 140

hybrid poplar (Populus spp.) was set at 0.34

Taxon · Methods, p. 130

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

Correction factor · Methods, p. 139

DBH range: 3–53 cm
R²: 0.81
Method: Weighted regression of ln(biomass) on ln(dbh) fitted to 64 pseudodata points generated from 10 published equations; no back-transform correction
Where: United States (equations compiled from US and Canadian studies)
Last checked: 2026-11-01

Calculate

DBH (cm)

289.3

Aboveground biomass (kg)

136

Carbon (kg), ×0.47

498.5

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	289.3	289.3	Computed from the printed form computed from the published form at dbh = 30 cm

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North American taxa group: Salicaceae ≥ 0.35 spg (Table 5) · Chojnacky et al. 2014 · DBH
North American taxa group: Fagaceae, deciduous (Table 5) · same paper · Aboveground biomass
North American taxa group: Hamamelidaceae (Table 5) · same paper · Aboveground biomass
North American taxa group: Magnoliaceae (Table 5) · same paper · Aboveground biomass
North American taxa group: Cornaceae/Ericaceae/Lauraceae/Platanaceae/Rosaceae/Ulmaceae (Table 5) · same paper · Aboveground biomass
North American taxa group: Pinus ≥ 0.45 spg (Table 5) · same paper · Aboveground biomass
North American taxa group: Salicaceae ≥ 0.35 spg (Table 5) · same paper · Aboveground biomass

Compare these curves

North American taxa group: Salicaceae < 0.35 spg (Table 5)

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