Pinus densiflora / Foliage biomass
Pinus densiflora needle (crown fuel) biomass from DBH (Table 3)
© harum.koh · CC BY-SA · iNaturalistAs printed (Eq. 1)
In this library's units, ready to compute (kg)
Foliage biomass = exp(1.893 * ln(D) - 3.835) * 1.028D- Diameter at breast height (1.3 m), cm
Needle dry mass (crown fuel), a foliage-only equation. Printed R2adj is 0.917. In Table 3 column 'a' is the ln(DBH) slope and 'b' the intercept, per Eq. 1. Correction factor 1.028 as printed (exp(s.e.e.^2/2)). Natural forests with a mix of managed and unmanaged stands. The paper also prints branch diameter-class equations (<0.5, 0.5-1, 1-2, 2-4, >4 cm) and a total crown fuel equation (needles + branches, no stem); those are not added because they are partial-branch or crown-only totals with no matching output quantity.
doi:10.3390/f17050549 · Open access · copy we read
Wt = exp(a ln(DBH) + b) × CF
Needles 67 1.893 (0.070) −3.835 (0.200) 0.917 0.236 1.028
A total of 67 sample trees were selected across the seven study areas
The average DBH and tree height were 18.1 cm (range: 5.0–35.1 cm) and 11.1 m (range: 4.5–19.6 m)
- Trees measured
- 67
- DBH range
- 5–35.1 cm
- Height range
- 4.5–19.6 m
- Correction factor
- 1.028 (applied)
- Method
- OLS regression of ln(W) on ln(DBH), back-transformed with a correction factor
- Where
- Seven sites across South Korea (Daegu, Yangyang, Yeongju, Bonghwa, Goryeong, Mungyeong, Seosan)
- 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 = 10 | 1.74 | 1.74 | Computed from the printed form computed from the Table 3 coefficients and correction factor |
| D = 25 | 9.84 | 9.83 | Computed from the printed form computed from the Table 3 coefficients and correction factor |
Related
- Foliage biomass, Pinus tecunumanii shade trees, power-law DBH+H · Chalupová et al. 2026 · DBH + Height
- Pinus caribaea needle biomass from DBH and height (simultaneous fit) · Coutinho et al. 2018 · DBH + Height
- Pinus cembroides, additive system S2 (D and H): foliage (twigs with leaves) biomass · Cuevas Cruz & Aquino Ramírez 2020 · DBH + Height
- Pinus brutia needle biomass, Lebanon (Eq. 29) · de-Miguel et al. 2014 · DBH + Height
- Pinus brutia needle biomass, Lebanon (Eq. 30) · de-Miguel et al. 2014 · DBH
- Pinus brutia needle biomass, Middle East (Eq. 39) · de-Miguel et al. 2014 · DBH + Height
- Pinus brutia needle biomass, Middle East (Eq. 40) · de-Miguel et al. 2014 · DBH
- Pinus brutia needle biomass, Syria (Eq. 20) · de-Miguel et al. 2014 · DBH