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

Root biomass equation for Euonymus verrucosus, Russia, from Kartashova et al. 2026. 16 trees. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Kartashova et al. 2026 (Eq. (1)/(2) and Table 2 (p. 10-11)):

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

Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#equation

In this library's units, ready to compute (root biomass in kg):

```
Root biomass = 1.48 * exp(-4.119 + 1.409 * ln(H))
```

Inputs: H = Total tree height (m).
The source's own form: 1.48 * exp(-4.119 + 1.409 * ln(H)), with H in m; output in kg.
Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#canonical

## What it covers

- Output: Root biomass, kg
- Taxon: Euonymus verrucosus (species), family Celastraceae; shrub
- Where: Prigorodnoye Forestry, Levoberezhnoe District Forestry, Voronezh Oblast (pine stands, forest-steppe). Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#where
- Biomes: temperate
- Stand: natural
- Trees measured: 16. Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#n_trees
- Height range: 0.3–1.7 m. Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#height
- R²: 0.318. Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#r2
- Correction factor: 1.48 (applied). Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#cf
- Method: log-log regression (OLS on natural logs), Baskerville correction factor. Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#method
- Verification: read in the original source
- Last checked: 2026-11-01. Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#checked_at

A missing fit statistic is one the source doesn't state, or that we haven't recorded; it is never estimated. Outside the stated DBH range or region, the equation is an extrapolation.

## 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: https://doi.org/10.34220/issn.2222-7962/2026.3/1
- Access: open access
- Copy we read: http://lestehjournal.ru/sites/default/files/journal_pdf/1._6-19_ltzh_2026_tom_16_no_3_63.pdf
- Every equation from this source: https://treeallometry.org/sources/kartashova-2026/
- Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#source

## The facts, in the source's words

**Equation** (Eq. (1)/(2) and Table 2 (p. 10-11)):

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

Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#equation

**Trees measured** (Table 1, p. 9):

> Euonymus verrucosus n = 16

Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#quote-fit-n-trees

**Our note:** 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.

## Checks this equation passes

On every build, the library's form and the source's own form (in its units) must both give these values within 1%.

| Inputs | Expected | We get | From |
| --- | --- | --- | --- |
| H = 0.5 | 0.00906 | 0.00906 | Computed from the printed form: hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied) |
| H = 1 | 0.0241 | 0.0241 | Computed from the printed form: hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied) |
| H = 1.5 | 0.0426 | 0.0426 | Computed from the printed form: hand-computed from the published form (Table 2 coefficients, Baskerville factor BaskCF applied) |

Cite: https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/#checks

The calculator on the page shows carbon as biomass × 0.47 (IPCC 2006 Guidelines, Vol. 4, Ch. 4, Table 4.3) and CO₂e as carbon × 44/12.

## How to cite

Cite the source for the equation: 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. https://doi.org/10.34220/issn.2222-7962/2026.3/1

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Euonymus verrucosus, belowground dry mass vs height (Model 2)", checked 2026-11-01, https://treeallometry.org/equations/kartashova-2026-euonymus-verrucosus-pbg-h/. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Quotes are the authors' words.

Data for this equation: https://treeallometry.org/data/equations/kartashova-2026-euonymus-verrucosus-pbg-h.json
Report a problem: email info@restorationscope.com with the equation id (kartashova-2026-euonymus-verrucosus-pbg-h) and where the right value appears.