{"id":"goodman-2013-iriartea-deltoidea","source":{"id":"goodman-2013","citation":"Goodman, R. C., Phillips, O. L., del Castillo Torres, D., Freitas, L., Cortese, S. T., Monteagudo, A., & Baker, T. R. (2013). Amazon palm biomass and allometry. Forest Ecology and Management, 310, 994–1004.","title":"Amazon palm biomass and allometry","authors":["Goodman, R. C.","Phillips, O. L.","del Castillo Torres, D."],"year":2013,"venue":"Forest Ecology and Management","doi":"10.1016/j.foreco.2013.09.045","url":"https://doi.org/10.1016/j.foreco.2013.09.045","read_url":"http://eprints.whiterose.ac.uk/77906/7/Amazon%20Palm%20Biomass_Goodman_with_coversheet.pdf","access":"paywalled","checked_at":"2026-11-01","status":"current"},"name":"Iriartea deltoidea AGB from diameter and stem height","output":{"quantity":"agb"},"expression":"1.0495 * exp(-3.483 + 0.94371 * ln(D^2 * Hstem))","published":{"expression":"1.0495 * exp(-3.483 + 0.94371 * ln(D^2 * Hstem))","units":{"D":"cm","Hstem":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Iriartea deltoidea","family":"Arecaceae","group":"palm"},"region":{"scope":"regional","countries":["PE"],"place":"Terra firme moist forest, forestry concession, Madre de Dios, Peru","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":21,"dbh_min_cm":6,"dbh_max_cm":33,"r2":0.967,"rse":0.311,"cf":1.0495,"method":"OLS on ln(AGB) vs ln(D²·Hstem); Baskerville correction exp(RSE²/2)"},"evidence":[{"field":"expression","quote":"Iriartea ln(AGB) ln(D2Hstem) -3.483 0.94371 0.967 21 0.311","locator":"Table 3"},{"field":"fit.dbh_min_cm","quote":"MdD Iriartea deltoidea 21 6-33 3.3-21.8 5.6-25.1","locator":"Table 1 (n, D cm, Hstem m, Htot m)"},{"field":"fit.cf","quote":"A correction factor, exp(RSE2/2), was applied to biomass estimates from logarithmically transformed models (Baskerville, 1972).","locator":"Section 2.4, lines 220–221 (author post-print)"}],"check":[{"inputs":{"D":20,"Hstem":15},"expected":118.5261,"origin":"computed","note":"computed from the Table 3 coefficients times exp(RSE²/2)"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Hstem = stem height, ground to the base of the lowest leaf (new canonical variable Hstem, m), not total height. Fitted Hstem range 3.3–21.8 m. Correction factor exp(0.311²/2) multiplied in."}