Tree Allometrics

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Euonymus verrucosus, belowground dry mass vs height (Model 2)

Root biomassEuonymus verrucosus · CelastraceaeRussianaturalRead from the original paper
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Equation

As printed (Eq. (1)/(2) and Table 2 (p. 10-11))

lnPbg = a0 + a1lnH; Euonymus verrucosus: a0 = -4,119, a1 = 1,409, BaskCF = 1,48

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

Root biomass = 1.48 * exp(-4.119 + 1.409 * ln(H))
H
Total tree height, m

Understory plant (small tree/shrub) under Scots pine. Output in kg: the text states kg for P; Table 1 headings say g, but the kg reading matches Table 1 ranges. Predictor is plant height H in m. Selected as the significant (p<0.05) model with the best fit among 18 species x fraction x predictor models; many others are not significant and were omitted.

Source
Euonymus verrucosus n = 16
Trees measured · Table 1, p. 9
Trees measured
16
Height range
0.3–1.7 m
R²
0.318
Correction factor
1.48 (applied)
Method
log-log regression (OLS on natural logs), Baskerville correction factor
Where
Prigorodnoye Forestry, Levoberezhnoe District Forestry, Voronezh Oblast (pine stands, forest-steppe)
Last checked
2026-11-01
Calculate
Height from
0.009
Root biomass (kg)
0.004
Carbon (kg), ×0.47
0.016
CO₂e (kg), ×44/12
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
H = 0.50.009060.00906Computed from the printed form
hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)
H = 10.02410.0241Computed from the printed form
hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)
H = 1.50.04260.0426Computed from the printed form
hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)

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