{"id":"mugasha-2019-h-wetlands","source":{"id":"mugasha-2019","citation":"Mugasha, W.A., Mauya, E.W., Njana, A.M., et al. (2019). Height-Diameter Allometry for Tree Species in Tanzania Mainland. International Journal of Forestry Research, 2019, 4832849.","title":"Height-Diameter Allometry for Tree Species in Tanzania Mainland","authors":["Mugasha, W.A.","Mauya, E.W.","Njana, A.M."],"year":2019,"venue":"International Journal of Forestry Research","doi":"10.1155/2019/4832849","url":"https://doi.org/10.1155/2019/4832849","read_url":"https://onlinelibrary.wiley.com/doi/10.1155/2019/4832849","access":"open","license":"CC BY 4.0","checked_at":"2026-11-02","status":"current"},"name":"Tanzania Wetland forests, height from D (base model, Table 4)","output":{"quantity":"height"},"expression":"1.3 + 20.4098 * exp(-23.1909 / (D + 6.7727))","published":{"expression":"1.3 + 20.4098 * exp(-23.1909 / (DBH + 6.7727))","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"m"},"taxon":{"level":"mixed","name":"Mixed tree species, Wetland forests","group":"mixed"},"region":{"scope":"national","countries":["TZ"],"place":"Tanzania Mainland, NAFORMA inventory (Wetland forests)","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":97,"dbh_min_cm":2.2,"dbh_max_cm":93,"h_min_m":2,"h_max_m":25,"method":"nonlinear mixed-effects regression (random effect on cluster), Ratkowsky form"},"evidence":[{"field":"expression","quote":"1.3 + 20.4098 × exp(−23.1909/(D + 6.7727))","locator":"Table 4, Wetlands row"},{"field":"fit.n_trees","quote":"Number of trees 97","locator":"Table 1, H, Wetlands column"}],"check":[{"inputs":{"D":5},"expected":4.1466,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":20},"expected":9.8831,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":50},"expected":14.865,"origin":"computed","note":"computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Base model (D only), Ratkowsky form selected for wetlands (Table 4). n_trees and ranges are the Table 1 statistics for wetlands."}