# Parque Cerrado, stem biomass with bark, independent fit (Table 2)

Stem biomass equation for Parque Cerrado tree species (mixed), Brazil, from Santana et al. 2021. 97 trees. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Santana et al. 2021 (Table 2, p. 712):

> BF = 0.01544 * DAP^2.01859 * Ht^1.11354

Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#equation

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

```
Stem biomass = 0.01544 * D^2.01859 * H^1.11354
```

Inputs: D = Diameter at breast height (1.3 m) (cm); H = Total tree height (m).
The source's own form: 0.01544 * DAP^2.01859 * Ht^1.11354, with DAP in cm, Ht in m; output in kg.
Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#canonical

## What it covers

- Output: Stem biomass, kg
- Taxon: Parque Cerrado tree species (mixed) (mixed species); mixed
- Where: Northwest Goiás, Parque Cerrado (Cerrado biome). Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#where
- Biomes: tropical, dryland
- Stand: natural
- Trees measured: 97. Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#n_trees
- Method: nonlinear least squares (Schumacher-Hall form), independent fit. Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#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

Santana, G.M., Araujo, E.C.G., Sanquetta, C.R., Péllico Netto, S., Venturoli, F. (2021). Ajuste independente e simultâneo para estimar biomassa acima do solo no Cerrado, fitofisionomia Parque Cerrado. Revista em Agronegócio e Meio Ambiente, 14(3), 707-716.

- DOI: https://doi.org/10.17765/2176-9168.2021v14n3e8125
- Access: open access
- Copy we read: https://periodicos.unicesumar.edu.br/index.php/rama/article/view/8125
- Every equation from this source: https://treeallometry.org/sources/santana-2021/
- Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#source

## The facts, in the source's words

**Equation** (Table 2, p. 712):

> BF = 0.01544 * DAP^2.01859 * Ht^1.11354

Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#equation

**Trees measured** (2.1 Caracterização da área e coleta de dados, p. 709):

> 97 indivíduos presentes em dez parcelas de 10 metros x 10 metros

Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#quote-fit-n-trees

**Our note:** BF is stem biomass (fuste com casca). Equation printed with DAP and Ht as variables; units are not stated beside the model and are read as DAP in cm and Ht in m (the paper gives the DAP >= 5 cm inclusion criterion and biomass in kg); magnitudes are consistent. Adjusted R2 (not R2) is printed, so fit.r2 is left out. The paper reports no DAP or height range of the fitted trees (only the DAP >= 5 cm inclusion criterion), so none is given. Dry biomass from 97 destructively sampled trees in ten 10 m x 10 m plots.

## 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, H = 4 | 1.86 | 1.86 | Computed from the printed form: hand-computed from the published form (coefficients as printed) |
| D = 10, H = 6 | 11.9 | 11.9 | Computed from the printed form: hand-computed from the published form (coefficients as printed) |
| D = 20, H = 9 | 75.4 | 75.4 | Computed from the printed form: hand-computed from the published form (coefficients as printed) |

Cite: https://treeallometry.org/equations/santana-2021-stem-independent/#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: Santana, G.M., Araujo, E.C.G., Sanquetta, C.R., Péllico Netto, S., Venturoli, F. (2021). Ajuste independente e simultâneo para estimar biomassa acima do solo no Cerrado, fitofisionomia Parque Cerrado. Revista em Agronegócio e Meio Ambiente, 14(3), 707-716. https://doi.org/10.17765/2176-9168.2021v14n3e8125

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Parque Cerrado, stem biomass with bark, independent fit (Table 2)", checked 2026-11-02, https://treeallometry.org/equations/santana-2021-stem-independent/. 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/santana-2021-stem-independent.json
Report a problem: email info@restorationscope.com with the equation id (santana-2021-stem-independent) and where the right value appears.