# Larix cajanderi, Ust-Yansky district, total aboveground biomass from DBH (Table 5)

Aboveground biomass equation for Larix cajanderi, Russia, from Delcourt & Veraverbeke 2022. 20 trees, DBH 1.8–18.9 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):

> Ust-Yansky district Aboveground 1.8–18.9 20 0.260 0.039 2.062 0.074 5.285; Y = a × DBH^b, Y in kg dry weight, DBH in cm

Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#equation

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

```
Aboveground biomass = 0.26 * D^2.062
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.26 * DBH^2.062, with DBH in cm; output in kg.
Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Larix cajanderi (species), family Pinaceae; conifer
- Where: Ust-Yansky district, Republic of Sakha, Russia (site-specific, Larix cajanderi stands). Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#where
- Biomes: boreal
- Stand: natural
- Trees measured: 20. Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#n_trees
- DBH range: 1.8–18.9 cm. Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#dbh
- Method: weighted nonlinear least squares power function, weights DBH^(-2c). Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#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-ustyansky-agb/#source

## The facts, in the source's words

**Equation** (Table 5):

> Ust-Yansky district Aboveground 1.8–18.9 20 0.260 0.039 2.062 0.074 5.285; Y = a × DBH^b, Y in kg dry weight, DBH in cm

Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#equation

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

> 20 trees, DBH range 1.8–18.9 cm

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

**Our note:** Coefficients as printed in Table 5 (3 decimals); no log back-transform because fitted by weighted nonlinear regression.

## 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 = 3 | 2.5 | 2.5 | Computed from the printed form: hand-computed from the published form |
| D = 8 | 18.9 | 18.9 | Computed from the printed form: hand-computed from the published form |
| D = 15 | 69.2 | 69.2 | Computed from the printed form: hand-computed from the published form |

Cite: https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/#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, Ust-Yansky district, total aboveground biomass from DBH (Table 5)", checked 2026-11-02, https://treeallometry.org/equations/delcourt-2022-ustyansky-agb/. 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-ustyansky-agb.json
Report a problem: email info@restorationscope.com with the equation id (delcourt-2022-ustyansky-agb) and where the right value appears.