{"id":"cortes-sanchez-2019-g2-stem","source":{"id":"cortes-sanchez-2019","citation":"Cortés-Sánchez, B. G., Ángeles-Pérez, G., De los Santos-Posadas, H. M., & Ramírez-Maldonado, H. (2019). Ecuaciones alométricas para estimar biomasa en especies de encino en Guanajuato, México. Madera y Bosques, 25(2), e2521799.","title":"Ecuaciones alométricas para estimar biomasa en especies de encino en Guanajuato, México","authors":["Cortés-Sánchez, B. G.","Ángeles-Pérez, G.","De los Santos-Posadas, H. M."],"year":2019,"venue":"Madera y Bosques","doi":"10.21829/myb.2019.2521799","url":"https://doi.org/10.21829/myb.2019.2521799","read_url":"https://myb.ojs.inecol.mx/index.php/myb/article/download/e2521799/1958","access":"open","license":"CC BY-NC-SA 4.0","checked_at":"2026-11-02","status":"current","notes":"Not added because the printed form does not reproduce sensible biomass: Table 5 foliage (Bh = 1.383732 × Dn^1.121362) and its total, Table 8 Group 2 foliage ((Dn² × At)^2.346752) and total, Table 9 Q. rugosa foliage (0.015364 × Dn² × At) and total."},"name":"Quercus group 2 (obtusata, coccolobifolia, sideroxyla): stem biomass","output":{"quantity":"stem_biomass"},"expression":"0.072967 * D^2.087881 * H^0.32756","published":{"expression":"0.072967 * Dn^2.087881 * At^0.32756","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Quercus group 2 (Q. obtusata, Q. coccolobifolia, Q. sideroxyla)","family":"Fagaceae","group":"broadleaf","members":["Quercus obtusata","Quercus coccolobifolia","Quercus sideroxyla"],"members_complete":true},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Santa Rosa, Guanajuato (bosques de encino)","biomes":["temperate"]},"stand":"natural","fit":{"dbh_min_cm":4.8,"dbh_max_cm":40.5,"h_min_m":3.55,"h_max_m":15.7,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Bf = 0.072967 × Dn^2.087881 × At^0.32756","locator":"Table 8, Grupo 2"}],"check":[{"inputs":{"D":15.5,"H":7.2},"expected":42.5819,"origin":"computed","note":"computed from the published form (Table 8)"},{"inputs":{"D":29.8,"H":12.1},"expected":197.602,"origin":"computed","note":"computed from the published form (Table 8)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Group sample size not stated; D and H ranges are the union of the three species' Table 1 ranges. Adjusted R2 (not stored): stem 0.90, branches 0.86 (Table 8). Foliage and total of this group not added (see source notes)."}