{"id":"altanzagas-2022-agb-czekanowskii-d-n","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 AGB from DBH only, unweighted (Table 3)","output":{"quantity":"agb"},"expression":"1.019 * exp(-2.748 + 2.493 * ln(D))","published":{"expression":"1.019 * exp(-2.748 + 2.493 * ln(D))","units":{"D":"cm"},"output_unit":"kg"},"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":1.019,"method":"log-log regression, unweighted"},"evidence":[{"field":"expression","quote":"N lnŶ = lna + b×lnD  -2.748  2.493  CF 1.019","locator":"Хүснэгт 3 (Table 3), Газрын дээрх биомасс (above-ground biomass), p. 124-126"},{"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},"expected":114.3407,"origin":"computed","note":"computed from the Table coefficients and the printed back-transform y = exp(lny) x CF (eq. 8)"},{"inputs":{"D":35},"expected":461.4181,"origin":"computed","note":"computed from the Table 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. Unweighted (N) regression row; the printed CF is applied as exp(lnŷ) x CF per eq. 8. Adjusted R² and RMSE are in the table but are not stored (adjusted R², and RMSE on the log or weighted scale). AGB is the sum of stem, branch and needle mass (Table 1), so foliage is included. Natural log assumed from the paper's ln notation."}