# Röhling et al. 2019: Equations for estimating belowground biomass of Silver Birch, Oak and Scots Pine in Germany

Röhling, S., Demant, B., Dunger, K., Neubauer, M., Oehmichen, K., Riedel, T., & Stümer, W. (2019). Equations for estimating belowground biomass of Silver Birch, Oak and Scots Pine in Germany. iForest, 12, 166-172.

- DOI: https://doi.org/10.3832/ifor2862-012
- Access: open access
- Copy we read: https://iforest.sisef.org/pdf/?id=ifor2862-012
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/rohling-2019/

## Equations from this source (3)

### Betula pendula, Germany, belowground biomass from DBH (Eq. 4, Tab. 1)

Root biomass for Betula pendula, Germany. Inputs: DBH. DBH 8.2–52.9 cm. 48 trees.

As printed (Eq. 4 and Tab. 1, p. 168):

> BGB = β1 · DBH^β2; Birch β1 0.04582 (0.0092-0.0824), β2 2.23951 (2.0047-2.4742), ME 0.81, RMSE 26.9

Page: https://treeallometry.org/equations/rohling-2019-bgb-birch/

### Pinus sylvestris, Germany, belowground biomass from DBH (Eq. 4, Tab. 1)

Root biomass for Pinus sylvestris, Germany. Inputs: DBH. DBH 7.2–53.2 cm. 54 trees.

As printed (Eq. 4 and Tab. 1, p. 168):

> BGB = β1 · DBH^β2; Pine β1 0.010617 (0.0053-0.0159), β2 2.593122 (2.4549-2.7312), ME 0.95, RMSE 13.7

Page: https://treeallometry.org/equations/rohling-2019-bgb-pine/

### Quercus robur and Q. petraea, Germany, belowground biomass from DBH (Eq. 4, Tab. 1)

Root biomass for Quercus (Q. robur and Q. petraea pooled), Germany. Inputs: DBH. DBH 7.4–42 cm. 39 trees.

As printed (Eq. 4 and Tab. 1, p. 168):

> BGB = β1 · DBH^β2; Oak β1 0.040113 (0.0253-0.0548), β2 2.227842 (2.1179-2.3377), ME 0.98, RMSE 5.2

Page: https://treeallometry.org/equations/rohling-2019-bgb-oak/