{"id":"vargas-larreta-2017-p-durangensis-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":"Pinus durangensis total aboveground biomass","output":{"quantity":"agb"},"expression":"(0.01204 * D^1.76074 * H^1.45047) + (0.01706 * D^1.37067 * H^1.10922) + (0.14589 * D^1.64608 * H^0.41109) + (0.00301 * D^1.50863 * H^1.15013)","published":{"expression":"(0.01204 * d^1.76074 * h^1.45047) + (0.01706 * d^1.37067 * h^1.10922) + (0.14589 * d^1.64608 * h^0.41109) + (0.00301 * d^1.50863 * h^1.15013)","units":{"d":"cm","h":"m"},"variables":{"d":"D","h":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus durangensis","family":"Pinaceae","group":"conifer"},"region":{"scope":"regional","countries":["MX"],"place":"Durango, Sierra Madre Occidental","biomes":["temperate","montane"]},"stand":"natural","fit":{"n_trees":130,"dbh_min_cm":8.7,"dbh_max_cm":44.5,"h_min_m":6.9,"h_max_m":29.8,"r2":0.96,"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":"0.01204d1.76074h1.45047","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.01706d1.37067h1.10922","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.14589d1.64608h0.41109","locator":"Table 2, p. 12"},{"field":"expression","quote":"0.00301d1.50863h1.15013","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 0.96 (cross-validation)","locator":"Table 2, p. 12"},{"field":"fit.n_trees","quote":"(130)","locator":"Table 1"}],"check":[{"inputs":{"D":20,"H":12},"expected":163.7,"origin":"computed","note":"computed from the Table 2 equations (sum of the four components)"},{"inputs":{"D":35,"H":18},"expected":656.45,"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."}