{"id":"giraldo-salazar-2025-croton","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":"Croton magdalenensis AGB, DBH and height (13-year restoration plantation)","output":{"quantity":"agb"},"expression":"1.043 * exp(-4.245 + 1.059*ln(D^2*H))","published":{"expression":"1.043 * exp(-4.245 + 1.059*ln(DBH^2*H))","units":{"DBH":"cm","H":"m"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Croton magdalenensis","family":"Euphorbiaceae","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":23,"dbh_min_cm":6.85,"dbh_max_cm":32.45,"h_min_m":8.4,"h_max_m":15.9,"r2":0.919,"rse":0.302,"cf":1.043,"method":"ln-ln linear regression (R 4.3.2), back-transformed with e^(RSE^2/2)"},"evidence":[{"field":"expression","quote":"AGB = 0.015 × (D^2 × H)^1.059","locator":"Table 7, equation 17"},{"field":"expression","quote":"ln(B) = −4.245 + 1.059 ln(D² × H)","locator":"Table 7, equation 17 (linear expression)"},{"field":"fit.cf","quote":"e^(RSE²/2) = 1.043","locator":"Table 7, equation 17"},{"field":"fit.n_trees","quote":"23","locator":"Table 7 / Table 2"}],"check":[{"inputs":{"D":8,"H":8},"expected":11.062,"origin":"computed","note":"computed from the published form (linear expression with printed correction factor)"},{"inputs":{"D":15,"H":12},"expected":64.346,"origin":"computed","note":"computed from the published form (linear expression with printed correction factor)"},{"inputs":{"D":25,"H":16},"expected":257.46,"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 prints the linear form as ln(B), meaning AGB.  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."}