{"id":"altanzagas-2022-vol-czekanowskii-dh-w","source":{"id":"altanzagas-2022","citation":"Altanzagas, B., Altansukh, B., Ariunbaatar, T., & Dorjsuren, C. (2022). Allometric equations for the above-ground biomass of Gmelin larch (Larix gmelinii Rupr.), Chekanovsky larch (Larix czekanowskii Szaf) in the Ereen Forest-Vegetation Province of Mongolia. Mongolian Journal of Botany, 4(30), 115-131.","title":"Allometric equations for the above-ground biomass of Gmelin larch (Larix gmelinii Rupr.), Chekanovsky larch (Larix czekanowskii Szaf) in the Ereen Forest-Vegetation Province of Mongolia","authors":["Altanzagas, B.","Altansukh, B.","Ariunbaatar, T."],"year":2022,"venue":"Mongolian Journal of Botany","doi":"10.5564/mjb.v4i30.2588","url":"https://doi.org/10.5564/mjb.v4i30.2588","read_url":"https://www.mongoliajol.info/index.php/MJB/article/download/2588/2814","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Chekanovsky larch stem volume from D and H, weighted (Table 2, selected)","output":{"quantity":"stem_volume"},"expression":"exp(-11.416 + 0.903 * ln(D) + 2.9 * ln(H))","published":{"expression":"exp(-11.416 + 0.903 * ln(D) + 2.9 * ln(H))","units":{"D":"cm","H":"m"},"output_unit":"m3"},"taxon":{"level":"species","name":"Larix czekanowskii","family":"Pinaceae","group":"conifer"},"region":{"scope":"site","countries":["MN"],"place":"Bayangol, Norovlin sum, Khentii, Mongolia (Eree Nuruu)","biomes":["boreal","montane"]},"stand":"natural","fit":{"n_trees":10,"dbh_min_cm":5.3,"dbh_max_cm":40,"h_min_m":4.6,"h_max_m":19.2,"cf":1,"method":"log-log regression, weighted"},"evidence":[{"field":"expression","quote":"W lnŶ = lna + b × lnD + c × lnH  -11.416  0.903  2.900  CF 1.000","locator":"Хүснэгт 2 (Table 2), Larix czekanowskii, p. 122"},{"field":"fit.cf","quote":"ŷ = exp(lnŷ)CF; CF=exp(S²/2)","locator":"Eqs. 7-8, Methods p. 119"},{"field":"fit.n_trees","quote":"Чекановскийн шинэсэн ойгоос авсан 10 шинэс модны ... диаметр 18.6 (5.3-40.0) см, өндөр 10.9 (4.6-19.2) м","locator":"Results p. 120"}],"check":[{"inputs":{"D":20,"H":11},"expected":0.1726,"origin":"computed","note":"computed from the Table 2 coefficients and the printed back-transform y = exp(lny) x CF (eq. 8)"},{"inputs":{"D":35,"H":16},"expected":0.8479,"origin":"computed","note":"computed from the Table 2 coefficients and the printed back-transform y = exp(lny) x CF (eq. 8)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Paper is in Mongolian; table values quoted as printed. Weighted (W) regression row; printed CF 1.000, so no correction applies. Adjusted R² and RMSE are in the table but are not stored (adjusted R², and RMSE on the log or weighted scale). Stem volume (m3) from Smalian sections. Natural log assumed from the paper's ln notation."}