# Quercus crassifolia

Fagaceae. 29 equations apply. Each output lists them most specific first: fitted on this species, on a variety of it, pooled fits that included it, then its genus and family. Within each step, equations the authors advised against go last, then those read from compilations; more trees come first. The order shows how specific the evidence is, not which equation predicts best.

Printed in sources as "Quercus crassifolia Humb. & Bonpl.".

## Aboveground biomass

1. Vargas-Larreta et al. 2017 (this species): Fitted on this species; 108 trees; DBH 8.5–43.1 cm; Read from the original paper.
   - [Quercus crassifolia total aboveground biomass](https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-agb/), Vargas-Larreta et al. 2017: Quercus crassifolia, Mexico; inputs DBH + Height; DBH 8.5–43.1 cm; 108 trees.

2. Ruiz-Aquino et al. 2014 (this species): Fitted on this species; 16 trees; DBH 5–31 cm; Read from the original paper.
   - [Quercus crassifolia, total aboveground biomass (Eq. 4, D²H)](https://treeallometry.org/equations/ruiz-aquino-2014-crassifolia-agb/), Ruiz-Aquino et al. 2014: Quercus crassifolia Humb. & Bonpl., Mexico; inputs DBH + Height; DBH 5–31 cm; 16 trees.

3. Cortés-Sánchez et al. 2019 (same genus): Fitted on 6 other Quercus species, not this one; 165 trees across all species; DBH 4.8–48.6 cm; Read from the original paper.
   - [Six Guanajuato oaks pooled, total aboveground biomass fitted directly (model 3)](https://treeallometry.org/equations/cortes-sanchez-2019-bt-m3/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs DBH + Height; DBH 4.8–48.6 cm; 165 trees.
   - [Six Guanajuato oaks pooled, total aboveground biomass fitted directly (model 4)](https://treeallometry.org/equations/cortes-sanchez-2019-bt-m4/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs Wood density + DBH + Height; DBH 4.8–48.6 cm; 165 trees.
   - [Six Guanajuato oaks pooled, system 1 (D and H): total aboveground biomass (sum of components)](https://treeallometry.org/equations/cortes-sanchez-2019-sys1-agb/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs DBH + Height; DBH 4.8–48.6 cm; 165 trees.

4. Meng et al. 2021 (same genus): Fitted on 2 other Quercus species, not this one; 159 trees across all species; DBH 1.5–33 cm; Read from the original paper.
   - [Oak aboveground biomass from D, additive system 1 (Table 4)](https://treeallometry.org/equations/meng-2021-agb-d/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH; DBH 1.5–33 cm; 159 trees.

5. Du et al. 2026 (same genus): Fitted on the genus Quercus; 157 trees across all species; DBH 3.5–38.9 cm; Read from the original paper.
   - [Oak aboveground biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-oak-agb/), Du et al. 2026: Quercus, China; inputs DBH + Height; DBH 3.5–38.9 cm; 157 trees.

6. Vargas-Larreta et al. 2017 (same genus): Fitted on the genus Quercus; Number of trees not stated; Read from the original paper.
   - [Quercus total aboveground biomass](https://treeallometry.org/equations/vargas-larreta-2017-all-oaks-agb/), Vargas-Larreta et al. 2017: Quercus, Mexico; inputs DBH + Height.

7. Chojnacky et al. 2014 (same family): Fitted on the family Fagaceae; Number of trees not stated; DBH 3–89 cm; Read from the original paper.
   - [North American taxa group: Fagaceae, deciduous (Table 5)](https://treeallometry.org/equations/chojnacky-2014-fagaceae-deciduous/), Chojnacky et al. 2014: Fagaceae, United States; inputs DBH; DBH 3–89 cm.

## Total biomass

1. Du et al. 2026 (same genus): Fitted on the genus Quercus; 157 trees across all species; DBH 3.5–38.9 cm; Read from the original paper.
   - [Oak total tree biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-oak-total/), Du et al. 2026: Quercus, China; inputs DBH + Height; DBH 3.5–38.9 cm; 157 trees.

## Stem biomass

1. Ruiz-Aquino et al. 2014 (this species): Fitted on this species; 16 trees; DBH 5–31 cm; Read from the original paper.
   - [Quercus crassifolia, stem biomass (Eq. 4, D²H)](https://treeallometry.org/equations/ruiz-aquino-2014-crassifolia-stem/), Ruiz-Aquino et al. 2014: Quercus crassifolia Humb. & Bonpl., Mexico; inputs DBH + Height; DBH 5–31 cm; 16 trees.

2. Cortés-Sánchez et al. 2019 (same genus): Fitted on 6 other Quercus species, not this one; 165 trees across all species; DBH 4.8–48.6 cm; Read from the original paper.
   - [Six Guanajuato oaks pooled, system 1 (D and H): stem biomass](https://treeallometry.org/equations/cortes-sanchez-2019-sys1-stem/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs DBH + Height; DBH 4.8–48.6 cm; 165 trees.
   - [Six Guanajuato oaks pooled, system 2 (wood density, D and H): stem biomass](https://treeallometry.org/equations/cortes-sanchez-2019-sys2-stem/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs Wood density + DBH + Height; DBH 4.8–48.6 cm; 165 trees.

## Branch biomass

1. Vargas-Larreta et al. 2017 (this species): Fitted on this species; 108 trees; DBH 8.5–43.1 cm; Read from the original paper.
   - [Quercus crassifolia branch biomass (wood and bark)](https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-branch/), Vargas-Larreta et al. 2017: Quercus crassifolia, Mexico; inputs DBH + Height; DBH 8.5–43.1 cm; 108 trees.

2. Ruiz-Aquino et al. 2014 (this species): Fitted on this species; 16 trees; DBH 5–31 cm; Read from the original paper.
   - [Quercus crassifolia, branch biomass (Eq. 4, D²H)](https://treeallometry.org/equations/ruiz-aquino-2014-crassifolia-branch/), Ruiz-Aquino et al. 2014: Quercus crassifolia Humb. & Bonpl., Mexico; inputs DBH + Height; DBH 5–31 cm; 16 trees.

3. Cortés-Sánchez et al. 2019 (same genus): Fitted on 6 other Quercus species, not this one; 165 trees across all species; DBH 4.8–48.6 cm; Read from the original paper.
   - [Six Guanajuato oaks pooled, system 1 (D and H): branch biomass](https://treeallometry.org/equations/cortes-sanchez-2019-sys1-branch/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs DBH + Height; DBH 4.8–48.6 cm; 165 trees.
   - [Six Guanajuato oaks pooled, system 2 (wood density, D and H): branch biomass](https://treeallometry.org/equations/cortes-sanchez-2019-sys2-branch/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs Wood density + DBH + Height; DBH 4.8–48.6 cm; 165 trees.

4. Meng et al. 2021 (same genus): Fitted on 2 other Quercus species, not this one; 159 trees across all species; DBH 1.5–33 cm; Read from the original paper.
   - [Oak branch biomass from D, additive system 1 (Table 4)](https://treeallometry.org/equations/meng-2021-branch-d/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH; DBH 1.5–33 cm; 159 trees.
   - [Oak branch biomass from D and crown width, additive system 2 (Table 4)](https://treeallometry.org/equations/meng-2021-branch-dcw/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH + Crown diameter; DBH 1.5–33 cm; 159 trees.

5. Vargas-Larreta et al. 2017 (same genus): Fitted on the genus Quercus; Number of trees not stated; Read from the original paper.
   - [Quercus branch biomass (wood and bark)](https://treeallometry.org/equations/vargas-larreta-2017-all-oaks-branch/), Vargas-Larreta et al. 2017: Quercus, Mexico; inputs DBH + Height.

## Foliage biomass

1. Vargas-Larreta et al. 2017 (this species): Fitted on this species; 108 trees; DBH 8.5–43.1 cm; Read from the original paper.
   - [Quercus crassifolia foliage biomass](https://treeallometry.org/equations/vargas-larreta-2017-q-crassifolia-foliage/), Vargas-Larreta et al. 2017: Quercus crassifolia, Mexico; inputs DBH + Height; DBH 8.5–43.1 cm; 108 trees.

2. Ruiz-Aquino et al. 2014 (this species): Fitted on this species; 16 trees; DBH 5–31 cm; Read from the original paper.
   - [Quercus crassifolia, foliage biomass (Eq. 4, D²H)](https://treeallometry.org/equations/ruiz-aquino-2014-crassifolia-foliage/), Ruiz-Aquino et al. 2014: Quercus crassifolia Humb. & Bonpl., Mexico; inputs DBH + Height; DBH 5–31 cm; 16 trees.

3. Cortés-Sánchez et al. 2019 (same genus): Fitted on 6 other Quercus species, not this one; 165 trees across all species; DBH 4.8–48.6 cm; Read from the original paper.
   - [Six Guanajuato oaks pooled, system 1 (D and H): foliage (twigs with leaves) biomass](https://treeallometry.org/equations/cortes-sanchez-2019-sys1-foliage/), Cortés-Sánchez et al. 2019: Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans), Mexico; inputs DBH; DBH 4.8–48.6 cm; 165 trees.

4. Meng et al. 2021 (same genus): Fitted on 2 other Quercus species, not this one; 159 trees across all species; DBH 1.5–33 cm; Read from the original paper.
   - [Oak foliage biomass from D, additive system 1 (Table 4)](https://treeallometry.org/equations/meng-2021-foliage-d/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH; DBH 1.5–33 cm; 159 trees.
   - [Oak foliage biomass from D and crown width, additive system 2 (Table 4)](https://treeallometry.org/equations/meng-2021-foliage-dcw/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH + Crown diameter; DBH 1.5–33 cm; 159 trees.

5. Vargas-Larreta et al. 2017 (same genus): Fitted on the genus Quercus; Number of trees not stated; Read from the original paper.
   - [Quercus foliage biomass](https://treeallometry.org/equations/vargas-larreta-2017-all-oaks-foliage/), Vargas-Larreta et al. 2017: Quercus, Mexico; inputs DBH.

## Root biomass

1. Meng et al. 2021 (same genus): Fitted on 2 other Quercus species, not this one; 53 trees across all species; DBH 1.5–32.8 cm; Read from the original paper.
   - [Oak root biomass from D (Table 3)](https://treeallometry.org/equations/meng-2021-root-d/), Meng et al. 2021: Quercus (Q. mongolica and Q. wutaishanica), China; inputs DBH; DBH 1.5–32.8 cm; 53 trees.

2. Du et al. 2026 (same genus): Fitted on the genus Quercus; 50 trees across all species; Read from the original paper.
   - [Oak root biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-oak-root/), Du et al. 2026: Quercus, China; inputs DBH + Height; 50 trees.

3. Röhling et al. 2019 (same genus): Fitted on 2 other Quercus species, not this one; 39 trees across all species; DBH 7.4–42 cm; Read from the original paper.
   - [Quercus robur and Q. petraea, Germany, belowground biomass from DBH (Eq. 4, Tab. 1)](https://treeallometry.org/equations/rohling-2019-bgb-oak/), Röhling et al. 2019: Quercus (Q. robur and Q. petraea pooled), Germany; inputs DBH; DBH 7.4–42 cm; 39 trees.