Equations / Aboveground biomass

Rubus idaeus, aboveground dry mass vs base diameter (Model 1)

Aboveground biomassRubus idaeus · RosaceaeRussianaturalRead from the original paper

Equation

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

lnPag = a0 + a1lnD0; Rubus idaeus: a0 = -3,937, a1 = 0,979, BaskCF = 1,24

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

Aboveground biomass = 1.24 * exp(-3.937 + 0.979 * ln(DRC))

DRC: Root collar / stem base diameter, cm

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 the ranges in Table 1 (e.g. Sambucus Pag max 943 g = 0.943 kg). Predictor is base diameter D0 (root collar), mapped to canonical DRC.

Source

Kartashova, N.P., Sheshnitsan, S.S., Tsaregorodtsev, A.V. (2026). Allometric models of biomass of understory trees and shrubs in pine stands of Voronezh Oblast. Forestry Engineering Journal (Lesotekhnicheskii zhurnal), 16(3), 6–19.

doi:10.34220/issn.2222-7962/2026.3/1 · Open access · copy we read

Rubus idaeus n = 12

Trees measured · Table 1, p. 9

Trees measured: 12
R²: 0.372
Correction factor: 1.24 (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

Root collar diameter (cm)

0.01

Aboveground biomass (kg)

0.005

Carbon (kg), ×0.47

0.017

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%.

Inputs	Expected	We get	From
DRC = 0.4	0.00986	0.00986	Computed from the printed form hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)
DRC = 0.8	0.0194	0.0194	Computed from the printed form hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)
DRC = 1.2	0.0289	0.0289	Computed from the printed form hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied)

Report a problem with this equation · JSON

Acer campestre, aboveground dry mass vs height (Model 2) · same paper · Aboveground biomass
Euonymus verrucosus, belowground dry mass vs height (Model 2) · same paper · Root biomass
Sambucus racemosa, aboveground dry mass vs base diameter (Model 1) · same paper · Aboveground biomass
Sambucus racemosa, belowground dry mass vs base diameter (Model 1) · same paper · Root biomass

Rubus idaeus, aboveground dry mass vs base diameter (Model 1)

Related