{"id":"teshome-2022-vol-m1","source":{"id":"teshome-2022","citation":"Teshome, M., Torres, C.M.M.E., Sileshi, G.W., de Mattos, P.P., Braz, E.M., Temesgen, H., da Rocha, S.J.S.S., Alebachew, M. (2022). Mixed-Species Allometric Equations to Quantify Stem Volume and Tree Biomass in Dry Afromontane Forest of Ethiopia. Open Journal of Forestry, 12(3), 263-296.","title":"Mixed-Species Allometric Equations to Quantify Stem Volume and Tree Biomass in Dry Afromontane Forest of Ethiopia","authors":["Teshome, M.","Torres, C.M.M.E.","Sileshi, G.W."],"year":2022,"venue":"Open Journal of Forestry","doi":"10.4236/ojf.2022.123015","url":"https://doi.org/10.4236/ojf.2022.123015","read_url":"https://content.scirp.org/pdf/ojf_2022050715212549.pdf","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current","notes":"Only the linear (ln-ln) models of Tables 4 and 6 are extracted. The nonlinear models are not extracted: their printed beta0 values are rounded to 0.0001-0.0015 and, in Table 6, the M13 and M14 rows look swapped relative to the forms in Table 1 (M13 row has four parameters, M14 row has two). The abstract says 193 trees; Section 2.4 says 194 sampled and one 98 cm leverage tree excluded from all analyses, so 193 were used."},"name":"Stem volume from DBH (M1)","output":{"quantity":"stem_volume"},"expression":"1.004 * (exp(-8.907 + 2.385 * ln(D)))","published":{"expression":"exp(-8.907 + 2.385 * ln(d))","units":{"d":"cm"},"variables":{"d":"D"},"output_unit":"m3"},"taxon":{"level":"mixed","name":"Seven dominant species of Chilimo forest (Juniperus procera, Podocarpus falcatus, Olea africana, Allophylus abyssinicus, Olinia rochetiana, Rhus glutinosa, Scolopia theifolia)","group":"mixed","members":["Juniperus procera","Podocarpus falcatus","Olea africana","Allophylus abyssinicus","Olinia rochetiana","Rhus glutinosa","Scolopia theifolia"],"members_complete":true},"region":{"scope":"site","countries":["ET"],"place":"Chilimo dry Afromontane forest, central Ethiopia","biomes":["montane"]},"stand":"natural","fit":{"n_trees":193,"dbh_min_cm":6.2,"dbh_max_cm":85,"h_min_m":5.6,"h_max_m":27.4,"cf":1.004,"method":"Robust linear regression (rlm, Tukey bisquare) of ln(response) on ln predictors"},"evidence":[{"field":"expression","quote":"M1 ln(v) = ln(β0) + β1 ln(d) + ε ... -8.907 2.385","locator":"Table 1 and Table 4"},{"field":"fit.n_trees","quote":"A total of 193 sampled trees from seven dominant tree species were used to develop the equations.","locator":"Abstract"},{"field":"fit.dbh","quote":"The diameter, total height, and wood density ranged between 6.2 and 85.0 cm, 5.6 and 27.4 m","locator":"Section 3.1"},{"field":"fit.cf","quote":"CF 1.004","locator":"Supplementary Table S4, p. 293"}],"check":[{"inputs":{"D":20},"expected":0.172357,"origin":"computed","note":"hand-computed from the published form; CF 1.004 applied"},{"inputs":{"D":50},"expected":1.532907,"origin":"computed","note":"hand-computed from the published form; CF 1.004 applied"}],"verification":"original_read","checked_at":"2026-11-02","notes":"cf is left out. Stem volume from Smalian sections of felled trees, over bark, excluding branches and leaves. Range in fit is for the 194 sampled trees (Table 3, Section 3.1). Back-transform CF 1.004 from Table S4 applied in expression."}