{"id":"riofrio-2013-acacia-melanoxylon","source":{"id":"riofrio-2013","citation":"Riofrío, J., Herrero de Aza, C., Grijalva, J., & Bravo, F. (2013). Modelos para estimar la biomasa de especies forestales en sistemas agroforestales de la ecorregión andina del Ecuador. 6º Congreso Forestal Español, Vitoria-Gasteiz, Spain. Paper 6CFE01-023.","title":"Modelos para estimar la biomasa de especies forestales en sistemas agroforestales de la ecorregión andina del Ecuador","authors":["Riofrío, J.","Herrero de Aza, C.","Grijalva, J."],"year":2013,"venue":"6º Congreso Forestal Español (Sociedad Española de Ciencias Forestales)","url":"https://www.congresoforestal.es/actas/doc/6CFE/6CFE01-023.pdf","access":"open","checked_at":"2026-11-01","status":"current"},"name":"Acacia melanoxylon AGB in Andean agroforestry, sum of SUR component models (DBH, height)","output":{"quantity":"agb"},"expression":"0.083622 * D^1.826783 * H^0.689611 + 0.365815 * D^2 - 1.044164 * H - 0.170251 * D * H","published":{"expression":"0.083622*DBH^1.826783*Ht^0.689611 + 0.101503*DBH^2 - 1.044164*Ht + 0.144577*DBH^2 - 0.094715*DBH*Ht + 0.119735*DBH^2 - 0.075536*DBH*Ht","units":{"DBH":"cm","Ht":"m"},"variables":{"DBH":"D","Ht":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Acacia melanoxylon","family":"Fabaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["EC"],"place":"Two INIAP agroforestry systems, inter-Andean western cordillera of northern/central Ecuador, above 3000 m (Bosque Siempreverde Montano Alto)","biomes":["tropical","montane"]},"stand":"agroforestry","fit":{"n_trees":30,"dbh_min_cm":13.4,"dbh_max_cm":31.5,"h_min_m":11.3,"h_max_m":24.3,"r2":0.906,"method":"Component models (stem, coarse branches, thin branches, leaves) fitted by SUR; total = sum of components"},"evidence":[{"field":"expression","quote":"W f = 0,083622*DBH 1,826783 *Ht 0,689611","locator":"Tabla 4, Acacia, Fuste"},{"field":"expression","quote":"W rg = 0,101503*DBH2 – 1,044164*Ht","locator":"Tabla 4, Acacia, Ramas gruesas"},{"field":"expression","quote":"W rd = 0,144577*DBH2 - 0,094715*DBH*Ht","locator":"Tabla 4, Acacia, Ramas delgadas"},{"field":"expression","quote":"W h = 0,119735*DBH2 - 0,075536*DBH*Ht","locator":"Tabla 4, Acacia, Hojas"},{"field":"fit.r2","quote":"Biomasa total 44,34 0,906","locator":"Tabla 4, Acacia (RMSE kg, R2 ajustado)"},{"field":"fit.dbh_min_cm","quote":"Acacia 30 22,4 4,4 13,4 31,5 17,9 2,4 11,3 24,3","locator":"Tabla 1"}],"check":[{"inputs":{"D":22.4,"H":17.9},"expected":275.6212,"origin":"computed","note":"computed at the sample means (observed mean Wt 286,8 kg, Tabla 1)"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Introduced species widely planted in Andean agroforestry. Total aboveground dry biomass (kg) is the sum of the four Tabla 4 component equations; exponents printed as superscripts in the stem model."}