Equations / Aboveground biomass
Kintampo woodlands mixed-species AGB, M4: dbh and height
Aboveground biomass31 woodland tree species harvested for charcoalGhananaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 5 (parameter estimates))
M4 a4 0.05 0.039–0.062 0.04–0.060 b4 0.974 0.941–1.007
In this library's units, ready to compute (kg)
Aboveground biomass = 0.05 * H * D^(2 * 0.974)H- Total tree height, m
D- Diameter at breast height (1.3 m), cm
Mixed-species model; AGB is the sum of logs, small branches, twigs and leaves, so foliage is included. Fitted by non-linear regression, so no back-transformation correction. Wood density ρ is the species mean of disc samples (oven-dry mass / volume), in g/cm³. Coefficients are the Table 5 estimates rounded as printed.
Source
doi:10.1186/s40663-020-00250-3 · Open access · copy we read
M4 a4[H(dbh)^(2b4)]
Destructive sampling was carried out on 745 trees
The dbh of individual trees ranged from 5.0 to 48.2 cm
- Trees measured
- 745
- DBH range
- 5–48.2 cm
- Method
- non-linear regression (variance proportional to squared mean)
- Where
- Kintampo Municipality, forest-savanna transition zone, Ghana
- Last checked
- 2026-11-02
Calculate
Height from
317
Aboveground biomass (kg)
149
Carbon (kg), ×0.47
547
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 25, H = 12 | 317 | 317 | Computed from the printed form hand-computed from the published form |
| D = 40, H = 12 | 792 | 792 | Computed from the printed form hand-computed from the published form |
Related
- Kintampo woodlands mixed-species AGB, M1: dbh only · Aabeyir et al. 2020 · DBH
- Kintampo woodlands mixed-species AGB, M2: dbh and wood density · Aabeyir et al. 2020 · Wood density + DBH
- Kintampo woodlands mixed-species AGB, M3: dbh and wood density · Aabeyir et al. 2020 · Wood density + DBH
- Kintampo woodlands mixed-species AGB, M5: dbh and height · Aabeyir et al. 2020 · DBH + Height
- Kintampo woodlands mixed-species AGB, M6 (best model): dbh, height and wood density · Aabeyir et al. 2020 · Wood density + DBH + Height
- Kintampo woodlands mixed-species AGB, M7: dbh, height and wood density · Aabeyir et al. 2020 · Wood density + DBH + Height
- Kintampo woodlands mixed-species AGB, M1: dbh only · same paper · Aboveground biomass
- Kintampo woodlands mixed-species AGB, M2: dbh and wood density · same paper · Aboveground biomass
- Kintampo woodlands mixed-species AGB, M3: dbh and wood density · same paper · Aboveground biomass
- Kintampo woodlands mixed-species AGB, M5: dbh and height · same paper · Aboveground biomass
- Kintampo woodlands mixed-species AGB, M6 (best model): dbh, height and wood density · same paper · Aboveground biomass
- Kintampo woodlands mixed-species AGB, M7: dbh, height and wood density · same paper · Aboveground biomass