# Magalhães 2015: Allometric equations for estimating belowground biomass of Androstachys johnsonii Prain

Magalhães, T.M. (2015). Allometric equations for estimating belowground biomass of Androstachys johnsonii Prain. Carbon Balance and Management, 10, 16.

- DOI: https://doi.org/10.1186/s13021-015-0027-4
- Access: open access
- Copy we read: https://cbmjournal.biomedcentral.com/track/pdf/10.1186/s13021-015-0027-4
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/magalhaes-2015/

## Equations from this source (4)

### Root system dry biomass from DBH (Table 4, form 4)

Root biomass for Androstachys johnsonii, Mozambique. Inputs: DBH. DBH 5–32 cm. 93 trees.

As printed (Table 4, Root system rows, and Eq. (4; Ŷ = b0 × DBH^b1)):

> Root system 1 1/0.00007 × DBH4.3051 0.0405 (±0.0064)*** 2.3402 (±0.0545)***

Page: https://treeallometry.org/equations/magalhaes-2015-root-system-dbh/

### Root system dry biomass from DBH and height (Table 4, form 5)

Root biomass for Androstachys johnsonii, Mozambique. Inputs: DBH + Height. DBH 5–32 cm. 93 trees.

As printed (Table 4, Root system rows, and Eq. (5; Ŷ = b0 × DBH^b1 × TH^b2)):

> Root system 2 1/0.000008 × DBH1.7645 0.0185 (±0.0064)** 2.1990 (±0.0793)*** 0.4699 (±0.1898)*

Page: https://treeallometry.org/equations/magalhaes-2015-root-system-dbh-th/

### Root system dry biomass from DBH²·H (Table 4, form 6)

Root biomass for Androstachys johnsonii, Mozambique. Inputs: DBH + Height. DBH 5–32 cm. 93 trees.

As printed (Table 4, Root system rows, and Eq. (6; Ŷ = b0 × (DBH² × TH)^b1)):

> Root system 3 1/0.0003 × DBH3.8639 0.0070 (±0.0015)*** 1.0226 (±0.0251)***

Page: https://treeallometry.org/equations/magalhaes-2015-root-system-d2h/

### Root system dry biomass from root collar diameter (Table 4, form 7)

Root biomass for Androstachys johnsonii, Mozambique. Inputs: Root collar diameter. 93 trees.

As printed (Table 4, Root system rows, and Eq. (7; Ŷ = b0 × RCD^b1)):

> Root system 4 1/0.00007 × RCD4.2484 0.0230 (±0.0042)*** 2.4519 (±0.0608)***

Page: https://treeallometry.org/equations/magalhaes-2015-root-system-rcd/