{"id":"cortes-sanchez-2019-g1-agb","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 1 (rugosa, candicans, laurina): total aboveground biomass (sum of components)","output":{"quantity":"agb"},"expression":"(0.031052 * D^1.992101 * H^0.835385) + (0.002501 * (D^2 * H)^1.165467) + (0.005943 * D^2.2394)","published":{"expression":"(0.031052 * Dn^1.992101 * At^0.835385) + (0.002501 * (Dn^2 * At)^1.165467) + (0.005943 * Dn^2.2394)","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Quercus group 1 (Q. rugosa, Q. candicans, Q. laurina)","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Santa Rosa, Guanajuato (bosques de encino)","biomes":["temperate"]},"stand":"natural","fit":{"dbh_min_cm":5.8,"dbh_max_cm":48.6,"h_min_m":4.35,"h_max_m":20.6,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Bt = ΣBi","locator":"Table 8, Grupo 1"},{"field":"expression","quote":"Bf = 0.031052 × Dn^1.992101 × At^0.835385","locator":"Table 8, Grupo 1"},{"field":"expression","quote":"Br = 0.002501 × (Dn² × At)^1.165467","locator":"Table 8, Grupo 1"},{"field":"expression","quote":"Bh = 0.005943 × Dn^2.23940","locator":"Table 8, Grupo 1"}],"check":[{"inputs":{"D":18.6,"H":9.2},"expected":101.398,"origin":"computed","note":"computed from the published form (Table 8)"},{"inputs":{"D":35.8,"H":15.7},"expected":663.32,"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 0.98, branches 0.85, foliage 0.80, total 0.96 (Table 8). Total is the sum of the component equations, as the paper defines it."}