Pinus taeda / Aboveground biomass, without leaves

NSVB loblolly pine (natural stands), species-level (all ecodivisions): total aboveground biomass (without foliage), segmented model (Eq. 2), D ≥ 9 in (22.86 cm)

Aboveground biomass, without leavesPinus taeda · PinaceaeUnited StatesnaturalRead from the original paper

Equation

As printed (Table S8a (Table S8a_total_biomass_coefs_spcd.csv, WO-GTR-104-Supp1), columns SPCD,DIVISION,STDORGCD,model,a,a1,b,b1,c,c1)

131,,0,2,0.0472227,,1.955146233,1.971465942,1.146284919,

In this library's units, ready to compute (kg)

Aboveground biomass, without leaves = 0.45359237 * 0.0472227 * 9^(1.955146233 - 1.971465942) * (D/2.54)^1.971465942 * (H/0.3048)^1.146284919

D: Diameter at breast height (1.3 m), cm
H: Total tree height, m

Output is gross AGB without foliage (AGBPredicted), before NSVB's cull and broken-top reductions and harmonization with components. DBH is measured at 4.5 ft (1.37 m). Paper units: in, ft, lb; expression converts D cm→in (/2.54), H m→ft (/0.3048) and lb→kg (×0.45359237). The scorecards don't split loblolly and slash pine by stand origin, so n and DBH range are left out. The DBH lower limit is the segmentation point k, not a data range. Upper branch of the segmented model; pair with westfall-2024-pinus-taeda-natural-agb-small. Species-level row: NSVB applies it in every ecodivision that has no row of its own for this species in this table.

Source

Westfall, J.A., Coulston, J.W., Gray, A.N., Shaw, J.D., Radtke, P.J., Walker, D.M., Weiskittel, A.R., et al. (2024). A national-scale tree volume, biomass, and carbon modeling system for the United States. Gen. Tech. Rep. WO-104. Washington, DC: USDA Forest Service. 37 p.

doi:10.2737/WO-GTR-104 · Open access · copy we read

yi = a × Di^b × Hi^c + εi; Di < k / yi = a × k^(b−b1) × Di^b1 × Hi^c + εi; Di ≥ k

Equation · Eq. 2, p. 2

Di is diameter (inches) at breast height (4.5 feet), Hi is total tree height (feet)

Units · Methods, Model development, p. 2

units for volume and biomass predictions are cubic feet and pounds, respectively

published.output unit · Examples of tree-level calculations, p. 8

131,loblolly pine,N,Pinus,taeda,,,Pinus taeda

Taxon · FIADB REF_SPECIES.csv (FIA DataMart), columns SPCD,COMMON_NAME,SHARED_COMMON_NAME_IND,GENUS,SPECIES,VARIETY,SUBSPECIES,SCIENTIFIC_NAME: the species codes the NSVB tables use

total aboveground biomass (without foliage)

output.excludes · Methods, Model development, p. 4

k is a set segmentation point that is 9.0 inches for softwoods (SPCD<300) and 11.0 inches for hardwoods (SPCD≥300)

Equation · Methods, Model development, p. 2

stand origins for planted (stand origin code (STDORGCD) = 1) and natural (STDORGCD = 0) stands may be fitted separately

stand · Methods, Model development, p. 3

If a species occurs in an ecodivision not explicitly listed, the entry having no ecodivision noted is used.

Where · Results, p. 6

DBH range: from 22.86 cm
Method: NSVB segmented model (Eq. 2), coefficients for SPCD 131 (species-level row, no DIVISION), STDORGCD 0 from table S8a; fitted with weighted regression to destructively sampled trees
Where: United States, species-level fit (NSVB uses it wherever table S8a has no row for the tree's ecodivision)
Last checked: 2026-11-03

Calculate

DBH (cm)Height (m)

Height from

701

Aboveground biomass, without leaves (kg)

329

Carbon (kg), ×0.47

1,208

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 = 38.1, H = 25.9	701	701	Computed from the printed form computed from the published form at D = 15 in, H = 85 ft, converted to cm, m and kg

Report a problem with this equation · JSON

Tropical pines AGB from DBH (Eq. 3.1.8 / 3.2.8) · Brown 1997 · DBH
Total aboveground biomass, Pinus tecunumanii shade trees, exponential DBH+H · Chalupová et al. 2026 · DBH + Height
Total aboveground biomass, Pinus tecunumanii shade trees, power-law DBH+H · Chalupová et al. 2026 · DBH + Height
North American taxa group: Pinus ≥ 0.45 spg (Table 5) · Chojnacky et al. 2014 · DBH
North American taxa group: Pinus < 0.45 spg (Table 5) · Chojnacky et al. 2014 · DBH
Pinus caribaea total aboveground biomass, sum of simultaneous component models · Coutinho et al. 2018 · DBH + Height + Wood density
Pinus cembroides, additive system S2 (D and H): total aboveground biomass (sum of components) · Cuevas Cruz & Aquino Ramírez 2020 · DBH + Height
Pinus brutia total biomass, Lebanon (Eq. 37) · de-Miguel et al. 2014 · DBH + Height
NSVB Pacific silver fir, Marine Division (240): total stem wood volume (inside bark), modified Wiley model (Eq. 4) · same paper · Stem volume
NSVB Pacific silver fir, species-level (all ecodivisions): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1) · same paper · Aboveground biomass, without leaves
NSVB Pacific silver fir, species-level (all ecodivisions): branch biomass (wood and bark), Schumacher-Hall model (Eq. 1) · same paper · Branch biomass
NSVB Pacific silver fir, Warm Continental Regime Mountains (M210): total stem wood volume (inside bark), modified Wiley model (Eq. 4) · same paper · Stem volume
NSVB Pacific silver fir, Marine Regime Mountains (M240): total stem wood volume (inside bark), modified Wiley model (Eq. 4) · same paper · Stem volume
NSVB Pacific silver fir, species-level (all ecodivisions): total stem wood volume (inside bark), modified Wiley model (Eq. 4) · same paper · Stem volume
NSVB balsam fir, Subarctic Division (130): total stem wood volume (inside bark), segmented model (Eq. 2), D ≥ 9 in (22.86 cm) · same paper · Stem volume
NSVB balsam fir, Subarctic Division (130): total stem wood volume (inside bark), segmented model (Eq. 2), D < 9 in (22.86 cm) · same paper · Stem volume

Compare these curves

NSVB loblolly pine (natural stands), species-level (all ecodivisions): total aboveground biomass (without foliage), segmented model (Eq. 2), D ≥ 9 in (22.86 cm)

Related