# Chekanovsky larch AGB from DBH only, weighted (Table 3)

Aboveground biomass equation for Larix czekanowskii, Mongolia, from Altanzagas et al. 2022. 10 trees, DBH 5.3–40 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Altanzagas et al. 2022 (Хүснэгт 3 (Table 3), Газрын дээрх биомасс (above-ground biomass), p. 124-126):

> W lnŶ = lna + b×lnD  -2.882  2.548  CF 1.000

Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#equation

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

```
Aboveground biomass = exp(-2.882 + 2.548 * ln(D))
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: exp(-2.882 + 2.548 * ln(D)), with D in cm; output in kg.
Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Larix czekanowskii (species), family Pinaceae; conifer
- Where: Bayangol, Norovlin sum, Khentii, Mongolia (Eree Nuruu). Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#where
- Biomes: boreal, montane
- Stand: natural
- Trees measured: 10. Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#n_trees
- DBH range: 5.3–40 cm. Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#dbh
- Height range: 4.6–19.2 m. Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#height
- Correction factor: 1 (applied). Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#cf
- Method: log-log regression, weighted. Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#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

Altanzagas, B., Altansukh, B., Ariunbaatar, T., & Dorjsuren, C. (2022). Allometric equations for the above-ground biomass of Gmelin larch (Larix gmelinii Rupr.), Chekanovsky larch (Larix czekanowskii Szaf) in the Ereen Forest-Vegetation Province of Mongolia. Mongolian Journal of Botany, 4(30), 115-131.

- DOI: https://doi.org/10.5564/mjb.v4i30.2588
- Access: open access
- Copy we read: https://www.mongoliajol.info/index.php/MJB/article/download/2588/2814
- Every equation from this source: https://treeallometry.org/sources/altanzagas-2022/
- Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#source

## The facts, in the source's words

**Equation** (Хүснэгт 3 (Table 3), Газрын дээрх биомасс (above-ground biomass), p. 124-126):

> W lnŶ = lna + b×lnD  -2.882  2.548  CF 1.000

Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#equation

**Correction factor** (Eqs. 7-8, Methods p. 119):

> ŷ = exp(lnŷ)CF; CF=exp(S²/2)

Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#quote-fit-cf

**Trees measured** (Results p. 120):

> Чекановскийн шинэсэн ойгоос авсан 10 шинэс модны ... диаметр 18.6 (5.3-40.0) см, өндөр 10.9 (4.6-19.2) м

Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#quote-fit-n-trees

**Our note:** Paper is in Mongolian; table values quoted as printed. Weighted (W) regression row; printed CF 1.000, so no correction applies. Adjusted R² and RMSE are in the table but are not stored (adjusted R², and RMSE on the log or weighted scale). AGB is the sum of stem, branch and needle mass (Table 1), so foliage is included. Natural log assumed from the paper's ln notation.

## 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 = 20 | 115.7 | 115.7 | Computed from the printed form: computed from the Table coefficients and the printed back-transform y = exp(lny) x CF (eq. 8) |
| D = 35 | 481.6 | 481.6 | Computed from the printed form: computed from the Table coefficients and the printed back-transform y = exp(lny) x CF (eq. 8) |

Cite: https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/#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: Altanzagas, B., Altansukh, B., Ariunbaatar, T., & Dorjsuren, C. (2022). Allometric equations for the above-ground biomass of Gmelin larch (Larix gmelinii Rupr.), Chekanovsky larch (Larix czekanowskii Szaf) in the Ereen Forest-Vegetation Province of Mongolia. Mongolian Journal of Botany, 4(30), 115-131. https://doi.org/10.5564/mjb.v4i30.2588

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Chekanovsky larch AGB from DBH only, weighted (Table 3)", checked 2026-11-02, https://treeallometry.org/equations/altanzagas-2022-agb-czekanowskii-d-w/. 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/altanzagas-2022-agb-czekanowskii-d-w.json
Report a problem: email info@restorationscope.com with the equation id (altanzagas-2022-agb-czekanowskii-d-w) and where the right value appears.