Equations / Aboveground biomass
Byrsonima gardneriana, total aerial dry biomass from ground-level diameter and height (Table 2)
As printed (Table 2, p. 360)
In this library's units, ready to compute (kg)
Aboveground biomass = -92.8787 + 58.8329 * H - 8.94707 * H^2 + 1.79877 * DRC * H + 0.522902 * DRC * H^2H- Total tree height, m
DRC- Root collar / stem base diameter, cm
Table 2 prints R2 as a percentage. D is diameter at ground level (DAS, 'diâmetro ao nível do solo', cm), mapped to DRC; H is total height in m; MS is dry mass in kg (Table 2 footnote). 'DH' and 'DH2' are read as D*H and D*H^2, and 'D2H' as D^2*H (variables listed on p. 358 as DAS*H, DAS*H2, DAS2*H). Total aerial dry biomass (leaves, branches, trunk). Diameter range of the sampled trees printed as 2,5 a 18 cm (ground-level diameter, so not entered as a DBH range): use inside that range. Equations were also fitted by diameter class for all species pooled (Table 3); those are not included here.
doi:10.4336/2013.pfb.33.76.579 · Open access · copy we read
amostrados 15 indivíduos, sendo três para cada classe de diâmetro, com exceção da espécie Chamaecrista belemii, em que foram amostrados 30 indivíduos
96,2 (R²)
- Trees measured
- 15
- R²
- 0.962
- Method
- regression; model chosen among literature models and Backward/Forward stepwise fits by residual plots, S%, t test and R2
- Where
- Casa Nova and Remanso, northern Bahia, lower-middle São Francisco (caatinga arbustivo-arbórea)
- Last checked
- 2026-11-02
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 |
|---|---|---|---|
| DRC = 4, H = 3 | 43.5 | 43.5 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
| DRC = 8, H = 4 | 123.8 | 123.8 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
| DRC = 14, H = 6 | 352.7 | 352.7 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
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