# Tanzania lowland forest, Dindili and Rondo combined, D, H and wood density (model 10) Aboveground biomass equation for Mixed lowland forest tree species, Tanzania, from Mugasha et al. 2016. 60 trees. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it. ## Equation As printed in Mugasha et al. 2016 (Table 5 (columns: a, b, c, error, RMSE, R2, AIC)): > General 10 0.0873 0.9458 0.559 × dbh1.673 567.9 0.87 840.94 Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#equation In this library's units, ready to compute (aboveground biomass in kg): ``` Aboveground biomass = 0.0873 * (rho * D^2 * H)^0.9458 ``` Inputs: rho = Wood density (oven-dry mass / green volume) (g/cm³); D = Diameter at breast height (1.3 m) (cm); H = Total tree height (m). The source's own form: 0.0873 * (WD * DBH^2 * HT)^0.9458, with WD in g/cm3, DBH in cm, HT in m; output in kg. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#canonical ## What it covers - Output: Aboveground biomass, kg - Taxon: Mixed lowland forest tree species (mixed species); broadleaf - Where: Dindili (Morogoro) and Rondo (Lindi) lowland forests, Tanzania. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#where - Biomes: tropical - Stand: natural - Trees measured: 60. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#n_trees - R²: 0.87. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#r2 - Method: maximum-likelihood non-linear regression with variance function. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#method - Verification: read in the original source - Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#checked_at A missing fit statistic is one the source doesn't state, or that we haven't recorded; it is never estimated. Outside the stated DBH range or region, the equation is an extrapolation. ## Source Mugasha, W.A., Mwakalukwa, E.E., Luoga, E., et al. (2016). Allometric Models for Estimating Tree Volume and Aboveground Biomass in Lowland Forests of Tanzania. International Journal of Forestry Research, 2016, 8076271. - DOI: https://doi.org/10.1155/2016/8076271 - Access: open access - Copy we read: https://onlinelibrary.wiley.com/doi/10.1155/2016/8076271 - Every equation from this source: https://treeallometry.org/sources/mugasha-2016/ - Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#source ## The facts, in the source's words **Equation** (Table 5 (columns: a, b, c, error, RMSE, R2, AIC)): > General 10 0.0873 0.9458 0.559 × dbh1.673 567.9 0.87 840.94 Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#equation **Units** (Section 2.6.2): > where Y is the volume (m3 tree−1) or biomass (kg tree−1); WD is wood basic density (g cm−3); a, b, and c are model parameters to be estimated. Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#quote-published-units **Trees measured** (Section 2.3): > A total of 30 trees were selected from each site Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#quote-fit-n-trees **Our note:** Fitted by maximum-likelihood non-linear regression with a variance function, no back-transformation. Table 5 column "R2" is stored as r2. Total AGB is the sum of stump, stem, branches, twigs and leaves, so foliage is included. Wood density WD is the tree's sample-disc basic density (g/cm³). The rendered equation (10) shows "Y^1 = a × (WD × dbh² × ht)^b"; the superscript 1 on Y is read as a typesetting artefact. ## Checks this equation passes On every build, the library's form and the source's own form (in its units) must both give these values within 1%. | Inputs | Expected | We get | From | | --- | --- | --- | --- | | rho = 0.6, D = 20, H = 15 | 202 | 202 | Computed from the printed form: hand-computed from the published form | | rho = 0.8, D = 50, H = 25 | 2,428 | 2,428 | Computed from the printed form: hand-computed from the published form | Cite: https://treeallometry.org/equations/mugasha-2016-agb-general-m10/#checks The calculator on the page shows carbon as biomass × 0.47 (IPCC 2006 Guidelines, Vol. 4, Ch. 4, Table 4.3) and CO₂e as carbon × 44/12. ## How to cite Cite the source for the equation: Mugasha, W.A., Mwakalukwa, E.E., Luoga, E., et al. (2016). Allometric Models for Estimating Tree Volume and Aboveground Biomass in Lowland Forests of Tanzania. International Journal of Forestry Research, 2016, 8076271. https://doi.org/10.1155/2016/8076271 Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Tanzania lowland forest, Dindili and Rondo combined, D, H and wood density (model 10)", checked 2026-11-02, https://treeallometry.org/equations/mugasha-2016-agb-general-m10/. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Quotes are the authors' words. Data for this equation: https://treeallometry.org/data/equations/mugasha-2016-agb-general-m10.json Report a problem: email info@restorationscope.com with the equation id (mugasha-2016-agb-general-m10) and where the right value appears.