Chamaecrista belemii / Aboveground biomass
Chamaecrista belemii, 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 = 0.722088 - 0.439452 * DRC + 1.57947 * H + 0.763683 * H^2 + 1.04003 * DRC * H + 0.4694498 * DRC * H^2DRC- Root collar / stem base diameter, cm
H- Total tree height, m
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 1 a 4 cm (ground-level diameter, so not entered as a DBH range): use inside that range. Sampled with 30 individuals; very small plants (1 to 4 cm). 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
79,1 (R²)
- Trees measured
- 30
- R²
- 0.791
- 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 = 1.5, H = 1 | 4.67 | 4.67 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
| DRC = 2.5, H = 1.5 | 10.3 | 10.3 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
| DRC = 3.5, H = 2 | 19.3 | 19.3 | Computed from the printed form hand-computed from the published form (coefficients as printed) |
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