{"id":"cortes-sanchez-2019-sys2-branch","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":"Six Guanajuato oaks pooled, system 2 (wood density, D and H): branch biomass","output":{"quantity":"branch_biomass"},"expression":"0.486602 * (rho * D^2 * H)^0.631701","published":{"expression":"0.486602 * (rho * Dn^2 * At)^0.631701","units":{"rho":"g/cm3","At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"genus","name":"Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans)","family":"Fagaceae","group":"broadleaf","members":["Quercus rugosa","Quercus obtusata","Quercus sideroxyla","Quercus coccolobifolia","Quercus laurina","Quercus candicans"],"members_complete":true},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Santa Rosa, Guanajuato (bosques de encino)","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":165,"dbh_min_cm":4.8,"dbh_max_cm":48.6,"h_min_m":3.55,"h_max_m":20.6,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Br = 0.486602 × (ρDn² × At)^0.631701","locator":"Table 5, model 4"},{"field":"fit.n_trees","quote":"Un total de 165 árboles","locator":"Methods / Table 1"}],"check":[{"inputs":{"D":17.9,"H":8.7,"rho":0.7},"expected":58.3008,"origin":"computed","note":"computed from the published form (Table 5)"},{"inputs":{"D":35.5,"H":15.5,"rho":0.8},"expected":216.996,"origin":"computed","note":"computed from the published form (Table 5)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dn and At are diameter at breast height and total height (At measured after felling, stump height included). Adjusted R2 (not stored): stem 0.9255, branches 0.7462 (Table 5). Wood density rho is oven-dry mass at 70 °C over green volume per the paper (g cm–3); pooled range 0.60 to 0.83 (Table 1). Foliage and total of this system not added (see source notes)."}