Sonneratia alba / Branch biomass
Sonneratia alba branch biomass, quadratic model (D)
© Oleg Kosterin · CC BY · iNaturalistAs printed (Table 4, Quadratic row)
In this library's units, ready to compute (kg)
Branch biomass = 287.956 - 36.906 * D + 1.157 * D^2D- Diameter at breast height (1.3 m), cm
Stand origin is not stated in the paper; classified natural from its reference to natural forest stands. Fitted on 8 of the 14 felled trees (the other 6 were held out for validation); the paper prints no DBH range for the fitting trees. The polynomial goes negative between about D = 14 and 18 cm, inside the sampled size range; the paper's Conclusion prints the linear coefficient as 3.906D, while Tables 4 and 12 print 36.906D (table value used).
doi:10.29303/jppipa.v12i5.15100 · Open access · copy we read
A total of 14 trees were felled to serve as measurement samples: 8 for model development and 6 for model validation.
70.5%
- Trees measured
- 8
- R²
- 0.705
- Method
- quadratic model B = a + bD + cD^2
- Where
- Tanah Merah Mangrove Forest, Kupang, East Nusa Tenggara
- Last checked
- 2026-11-02
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
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 = 12 | 11.7 | 11.7 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 20 | 12.6 | 12.6 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 26 | 111 | 111 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Sonneratia apetala branch biomass, a x^b of DBH * H (Table 4) · Lwin et al. 2026 · DBH + Height
- Sonneratia alba leaf biomass, multiple power model (D, H) · same paper · Foliage biomass
- Sonneratia alba stem biomass, exponential model (D) · same paper · Stem biomass
- Sonneratia alba stem biomass, multiple power model (D, H) · same paper · Stem biomass
- Sonneratia alba stem biomass, power model (D) · same paper · Stem biomass
- Sonneratia alba total aboveground biomass, exponential model (D) · same paper · Aboveground biomass
- Sonneratia alba total aboveground biomass, multiple power model (D, H) · same paper · Aboveground biomass
- Sonneratia alba total aboveground biomass, power model (D) · same paper · Aboveground biomass