{"id":"giraldo-salazar-2025-montanoa","source":{"id":"giraldo-salazar-2025","citation":"Giraldo-Salazar, J. M., Giraldo, J. A., Mendoza-Páez, J. S., Sierra, J. C., Rueda, J. A., & Osorio-Vélez, L. F. (2025). Allometric equations to quantify aboveground biomass in mixed-species plantations with restoration purposes in the tropical Andes. Journal of Forestry Research, 36, 44.","title":"Allometric equations to quantify aboveground biomass in mixed-species plantations with restoration purposes in the tropical Andes","authors":["Giraldo-Salazar, J. M.","Giraldo, J. A.","Mendoza-Páez, J. S."],"year":2025,"venue":"Journal of Forestry Research","doi":"10.1007/s11676-025-01827-w","url":"https://doi.org/10.1007/s11676-025-01827-w","read_url":"https://link.springer.com/article/10.1007/s11676-025-01827-w","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Montanoa quadrangularis AGB, DBH and height (13-year restoration plantation)","output":{"quantity":"agb"},"expression":"1.037 * exp(-5.242 + 1.137*ln(D^2*H))","published":{"expression":"1.037 * exp(-5.242 + 1.137*ln(DBH^2*H))","units":{"DBH":"cm","H":"m"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Montanoa quadrangularis","family":"Asteraceae","group":"broadleaf"},"region":{"scope":"site","countries":["CO"],"place":"Más Bosques para Medellín mixed restoration plantations, Aburrá valley, Medellín","biomes":["tropical","montane"]},"stand":"plantation","fit":{"n_trees":20,"dbh_min_cm":5.8,"dbh_max_cm":22.35,"h_min_m":6.65,"h_max_m":17.24,"r2":0.937,"rse":0.285,"cf":1.037,"method":"ln-ln linear regression (R 4.3.2), back-transformed with e^(RSE^2/2)"},"evidence":[{"field":"expression","quote":"AGB = 0.005 × (D^2 × H)^1.137","locator":"Table 7, equation 18"},{"field":"expression","quote":"ln(B) = −5.242 + 1.137 ln(D² × H)","locator":"Table 7, equation 18 (linear expression)"},{"field":"fit.cf","quote":"e^(RSE²/2) = 1.037","locator":"Table 7, equation 18"},{"field":"fit.n_trees","quote":"20","locator":"Table 7 / Table 2"}],"check":[{"inputs":{"D":8,"H":8},"expected":6.6016,"origin":"computed","note":"computed from the published form (linear expression with printed correction factor)"},{"inputs":{"D":15,"H":12},"expected":43.719,"origin":"computed","note":"computed from the published form (linear expression with printed correction factor)"},{"inputs":{"D":25,"H":16},"expected":193.73,"origin":"computed","note":"computed from the published form (linear expression with printed correction factor)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Table 7 rounds the multiplier to 0.005 (the unrounded value of exp(-5.242)*1.037 is about 0.0055), so the form is written from the linear expression, not from the printed 0.005.  Table 7 gives the final equation with the correction factor e^(RSE^2/2) folded into the coefficient a; here the published form is written from the linear expression in Table 7 with the printed correction factor applied, which agrees with the printed a. Dry mass in kg, D in cm, WD in g/cm3. Trees harvested 2022-2023 in 13-year-old plantations; AGB sums leaves, twigs, branches and trunk. Ranges are for the sampled trees (Table 2). RSE is as printed in Table 5/6."}