{"id":"djomo-2010-pan-d","source":{"id":"djomo-2010","citation":"Djomo, A.N., Ibrahima, A., Saborowski, J., Gravenhorst, G. (2010). Allometric equations for biomass estimations in Cameroon and pan moist tropical equations including biomass data from Africa. Forest Ecology and Management, 260(10), 1873–1885.","title":"Allometric equations for biomass estimations in Cameroon and pan moist tropical equations including biomass data from Africa","authors":["Djomo, A.N.","Ibrahima, A.","Saborowski, J."],"year":2010,"venue":"Forest Ecology and Management","doi":"10.1016/j.foreco.2010.08.034","url":"https://doi.org/10.1016/j.foreco.2010.08.034","read_url":"https://uni-goettingen.de/de/document/download/4df40c701547ab5773871feade802dc2.pdf/Djomo_et_al_(2010)_FORECOLMANAG_allometric_equations.pdf","access":"paywalled","checked_at":"2026-11-01","status":"current","notes":"Read from the authors' institutional PDF copy (Georg-August-Universität Göttingen). Seven of the paper's equations are captured: four Campo-Ma'an site equations (Table 3) and three pan moist tropical equations (Table 4). Leaf and branch equations (Table 3), the Table 3/4 variants not listed, and the height-diameter models (Table 6) are not captured."},"name":"Pan moist tropical AGB from DBH (Table 4, model 2)","output":{"quantity":"agb"},"expression":"exp(-2.1801 + 2.5624 * ln(D))","published":{"expression":"exp(-2.1801 + 2.5624 * ln(D))","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Mixed species, pan moist tropical forests (Campo-Ma'an plus data from Asia and South America)","group":"broadleaf"},"region":{"scope":"pantropical","countries":[],"place":"Moist tropical forests; Campo-Ma'an Cameroon, Brazil, Indonesia, Cambodia","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":443,"dbh_min_cm":1,"dbh_max_cm":148,"r2":0.9671,"rse":0.444,"method":"log-log regression"},"evidence":[{"field":"expression","quote":"2. ln(M) = a + b ln(D)   a = −2.1801  b = 2.5624","locator":"Table 4, model 2"},{"field":"fit.n_trees","quote":"N 443, RSE 0.444, Adj. R2 0.9671, D range 1–148","locator":"Table 4, model 2"}],"check":[{"inputs":{"D":30},"expected":688.92,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Pooled with data from Brown (1997), Araújo et al. (1999), Nelson et al. (1999) and Ketterings et al. (2001); Africa contributes only the Campo-Ma'an trees. The paper reports a larger average error (29.5%) for its general equations than for Chave et al. (2005) (20.3%) in cross-site tests. Coefficients are used as printed; the paper does not state that the log-scale back-transformation correction factor is included, so none is applied. Reported R² is the adjusted R². Equation chosen from the paper's recommended set (7 of its equations captured)."}