# Larix cajanderi, Magadan Oblast, stem (wood plus bark) biomass from DBH (Table 5)

Stem biomass equation for Larix cajanderi, Russia, from Delcourt & Veraverbeke 2022. 43 trees, DBH 3.9–52.8 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Delcourt & Veraverbeke 2022 (Table 5):

> Magadan Oblast Stem 3.9–52.8 43 0.066 0.014 2.493 0.068 40.934; Y = a × DBH^b, Y in kg dry weight, DBH in cm

Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#equation

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

```
Stem biomass = 0.066 * D^2.493
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.066 * DBH^2.493, with DBH in cm; output in kg.
Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#canonical

## What it covers

- Output: Stem biomass, kg
- Taxon: Larix cajanderi (species), family Pinaceae; conifer
- Where: Magadan Oblast, Russia (site-specific, Larix cajanderi stands). Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#where
- Biomes: boreal
- Stand: natural
- Trees measured: 43. Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#n_trees
- DBH range: 3.9–52.8 cm. Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#dbh
- Method: weighted nonlinear least squares power function, weights DBH^(-2c). Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#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

Delcourt, C. J. F., & Veraverbeke, S. (2022). Allometric equations and wood density parameters for estimating aboveground and woody debris biomass in Cajander larch (Larix cajanderi) forests of northeast Siberia. Biogeosciences, 19, 4499–4520.

- DOI: https://doi.org/10.5194/bg-19-4499-2022
- Access: open access
- Copy we read: https://bg.copernicus.org/articles/19/4499/2022/
- Every equation from this source: https://treeallometry.org/sources/delcourt-2022/
- Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#source

## The facts, in the source's words

**Equation** (Table 5):

> Magadan Oblast Stem 3.9–52.8 43 0.066 0.014 2.493 0.068 40.934; Y = a × DBH^b, Y in kg dry weight, DBH in cm

Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#equation

**Trees measured** (Table 5, Number of trees and DBH range columns):

> 43 trees, DBH range 3.9–52.8 cm

Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#quote-fit-n-trees

**Our note:** Coefficients as printed in Table 5 (3 decimals); no log back-transform because fitted by weighted nonlinear regression. 'Stem' is the stem row (the table also lists stem wood and stem bark separately; the contract has no output for those).

## 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 |
| --- | --- | --- | --- |
| D = 5 | 3.65 | 3.65 | Computed from the printed form: hand-computed from the published form |
| D = 15 | 56.4 | 56.4 | Computed from the printed form: hand-computed from the published form |
| D = 40 | 651 | 651 | Computed from the printed form: hand-computed from the published form |

Cite: https://treeallometry.org/equations/delcourt-2022-magadan-stem/#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: Delcourt, C. J. F., & Veraverbeke, S. (2022). Allometric equations and wood density parameters for estimating aboveground and woody debris biomass in Cajander larch (Larix cajanderi) forests of northeast Siberia. Biogeosciences, 19, 4499–4520. https://doi.org/10.5194/bg-19-4499-2022

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Larix cajanderi, Magadan Oblast, stem (wood plus bark) biomass from DBH (Table 5)", checked 2026-11-02, https://treeallometry.org/equations/delcourt-2022-magadan-stem/. 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/delcourt-2022-magadan-stem.json
Report a problem: email info@restorationscope.com with the equation id (delcourt-2022-magadan-stem) and where the right value appears.