{"id":"ounban-2016-euca-leaf-d2h","source":{"id":"ounban-2016","citation":"Ounban, W., Puangchit, L., & Diloksumpun, S. (2016). Development of general biomass allometric equations for Tectona grandis Linn.f. and Eucalyptus camaldulensis Dehnh. plantations in Thailand. Agriculture and Natural Resources, 50(1), 48–53.","title":"Development of general biomass allometric equations for Tectona grandis Linn.f. and Eucalyptus camaldulensis Dehnh. plantations in Thailand","authors":["Ounban, W.","Puangchit, L.","Diloksumpun, S."],"year":2016,"venue":"Agriculture and Natural Resources","doi":"10.1016/j.anres.2015.08.001","url":"https://doi.org/10.1016/j.anres.2015.08.001","read_url":"https://li01.tci-thaijo.org/index.php/anres/article/download/243871/166492","access":"open","license":"CC BY-NC-ND 4.0","checked_at":"2026-11-02","status":"current"},"name":"Eucalyptus camaldulensis leaf biomass from D²H","output":{"quantity":"foliage_biomass"},"expression":"0.013 * (D^2*H)^0.721","published":{"expression":"0.013 * (D^2*H)^0.721","units":{"D":"cm","H":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Eucalyptus camaldulensis","family":"Myrtaceae","group":"broadleaf"},"region":{"scope":"national","countries":["TH"],"place":"Plantations across Thailand","biomes":["tropical"]},"stand":"plantation","fit":{"n_trees":94,"dbh_min_cm":0.5,"dbh_max_cm":19.8,"h_min_m":1.7,"h_max_m":26,"r2":0.705,"method":"Least-squares power regression on untransformed data (weighted data from 12-13 published datasets)"},"evidence":[{"field":"expression","quote":"Wl = 0.013(D2H)0.721","locator":"Table 4"},{"field":"fit.n_trees","quote":"13 datasets with a total of 94 trees were chosen for E. camaldulensis","locator":"Methods, Compilation of biomass allometric equations"},{"field":"fit.dbh_min_cm","quote":"The ranges in the diameters and heights of trees in the dataset were 4.4–41.2 cm and 5.5–31.0 m for T. grandis, and 0.5–19.8 and 1.7–26.0 m for E. camaldulensis","locator":"Methods, Compilation of biomass allometric equations"},{"field":"fit.method","quote":"Linear regressions of untransformed data were used in the present study because log transformed data introduced a systematic bias","locator":"Methods, Reconstruction of biomass allometric equations"},{"field":"notes","quote":"general allometric equations for branches and leaves were excluded in the present study—only the stem and total aboveground biomass estimations were reported","locator":"Results and discussion, Construction of general allometric equations, p. 51"}],"check":[{"inputs":{"D":8,"H":10},"expected":1.3715,"origin":"computed","note":"computed from the published form"},{"inputs":{"D":15,"H":18},"expected":5.187,"origin":"computed","note":"computed from the published form"}],"verification":"original_read","checked_at":"2026-11-02","notes":"General (multi-site) equation fitted on pooled data compiled from published Thai plantation studies (theses, proceedings, reports), not on new felled trees; validated by the authors on independent harvests. D in cm, H in m, output kg dry weight per tree. AGB is the sum of stem, branches and leaves. Component symbol in the paper: Wl. The paper labels Wb as bark in its tables but as branches in the text, so no branch or bark model is entered. Caution: although Tables 3 and 4 print this leaf model, the authors state that the slope of the branch and leaf components differed significantly among spacings (ANCOVA) and that \"general allometric equations for branches and leaves were excluded in the present study—only the stem and total aboveground biomass estimations were reported\" (Results and discussion, Construction of general allometric equations)."}