{"id":"huynh-2022-eq10-d-n40","source":{"id":"huynh-2022","citation":"Huynh, T., Lewis, T., Applegate, G., Pachas, A. N. A., & Lee, D. J. (2022). Allometric Equations to Estimate Aboveground Biomass in Spotted Gum (Corymbia citriodora Subspecies variegata) Plantations in Queensland. Forests, 13(3), 486.","title":"Allometric Equations to Estimate Aboveground Biomass in Spotted Gum (Corymbia citriodora Subspecies variegata) Plantations in Queensland","authors":["Huynh, T.","Lewis, T.","Applegate, G."],"year":2022,"venue":"Forests","doi":"10.3390/f13030486","url":"https://doi.org/10.3390/f13030486","read_url":"https://www.mdpi.com/1999-4907/13/3/486/htm","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Spotted gum AGB from DBH, 40-tree dataset (Eq. 10)","output":{"quantity":"agb"},"expression":"0.10606 * D^2.56803","published":{"expression":"0.10606 * D^2.56803","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Corymbia citriodora subsp. variegata","family":"Myrtaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["AU"],"place":"Three plantation trials (451D, 451G, 13PHY), southeast Queensland","biomes":["subtropical"]},"stand":"plantation","fit":{"n_trees":40,"dbh_min_cm":17.1,"dbh_max_cm":42,"method":"weighted nonlinear regression (nlme)"},"evidence":[{"field":"expression","quote":"(10) 0.10606 2.56803 (α, β) for AGB = α × Dβ","locator":"Table 4, Eq. (10); form in Table 2"},{"field":"fit.n_trees","quote":"in 2020, the second dataset consisted of 40 sample trees ... (D ranges 17.1–42.0 cm)","locator":"Section 2.1"}],"check":[{"inputs":{"D":20},"expected":232.6139,"origin":"computed","note":"computed from the Table 4 parameter estimates"},{"inputs":{"D":38},"expected":1209.1587,"origin":"computed","note":"computed from the Table 4 parameter estimates"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Weighted nonlinear power model, so no back-transform correction applies. AGB is the total of stem, bark, large branches, small branches and leaves (Table 3), so foliage is included. Adjusted R² is printed in Table 4 but is not stored. Fitted on the 2020 mature-tree dataset only."}