{"id":"vargas-larreta-2017-q-durifolia-agb","source":{"id":"vargas-larreta-2017","citation":"Vargas-Larreta, B., López-Sánchez, C.A., Corral-Rivas, J.J., et al. (2017). Allometric Equations for Estimating Biomass and Carbon Stocks in the Temperate Forests of North-Western Mexico. Forests, 8(8), 269.","title":"Allometric Equations for Estimating Biomass and Carbon Stocks in the Temperate Forests of North-Western Mexico","authors":["Vargas-Larreta, B.","López-Sánchez, C.A.","Corral-Rivas, J.J."],"year":2017,"venue":"Forests","doi":"10.3390/f8080269","url":"https://doi.org/10.3390/f8080269","read_url":"https://www.mdpi.com/1999-4907/8/8/269","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current","notes":"Stem wood and stem bark component equations are not added (no matching output quantity: stem wood excludes bark). Total AGB is the printed sum of the four component equations."},"name":"Quercus durifolia total aboveground biomass","output":{"quantity":"agb"},"expression":"(0.1254 * D^1.7402 * H^0.8114) + (0.00235 * D^2.30073 * H^0.68619) + (0.00355 * D^2.66464 * H^0.56009) + (0.0073 * D^2.05034 * H^0.48685)","published":{"expression":"(0.1254 * d^1.7402 * h^0.8114) + (0.00235 * d^2.30073 * h^0.68619) + (0.00355 * d^2.66464 * h^0.56009) + (0.0073 * d^2.05034 * h^0.48685)","units":{"d":"cm","h":"m"},"variables":{"d":"D","h":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus durifolia","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["MX"],"place":"Durango, Sierra Madre Occidental","biomes":["temperate","montane"]},"stand":"natural","fit":{"n_trees":131,"dbh_min_cm":7,"dbh_max_cm":45.5,"h_min_m":5.4,"h_max_m":22.1,"r2":0.95,"method":"Power-law component equations fitted simultaneously by generalized method of moments (additive system)"},"evidence":[{"field":"expression","quote":"Wt = ΣWi","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.1254d1.7402h0.8114","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.00235d2.30073h0.68619","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.00355d2.66464h0.56009","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.0073d2.05034h0.48685","locator":"Table 2, p. 12"},{"field":"output","quote":"Wt is the total tree AGB (i.e., the sum of all the tree biomass components)","locator":"Section 2.3.1"},{"field":"fit.r2","quote":"R2 0.95 (cross-validation)","locator":"Table 2, p. 12"},{"field":"fit.n_trees","quote":"(131)","locator":"Table 1"}],"check":[{"inputs":{"D":20,"H":12},"expected":238.922,"origin":"computed","note":"computed from the Table 2 equations (sum of the four components)"},{"inputs":{"D":35,"H":18},"expected":974.319,"origin":"computed","note":"computed from the Table 2 equations (sum of the four components)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Equation as printed in the Table 2 system for this taxon; d is DBH in cm, h total height in m, output in kg dry mass. R² is the 10-fold cross-validation value. Total AGB is printed as Wt = sum of the four components (stem wood, stem bark, branches, foliage); the expression is that sum of the four printed equations."}