{"id":"akbar-2012-dbh-wd-ln","source":{"id":"akbar-2012","citation":"Akbar, A. (2012). Persamaan Allometrik untuk Menduga Kandungan Karbon Jenis Meranti (Shorea teysmaniana) di Hutan Alam Rawa Gambut Kalimantan Tengah. Jurnal Penelitian Sosial dan Ekonomi Kehutanan, 9(1), 1-11.","title":"Persamaan Allometrik untuk Menduga Kandungan Karbon Jenis Meranti (Shorea teysmaniana) di Hutan Alam Rawa Gambut Kalimantan Tengah","authors":["Akbar, A."],"year":2012,"venue":"Jurnal Penelitian Sosial dan Ekonomi Kehutanan","doi":"10.20886/jsek.2012.9.1.1-11","url":"https://doi.org/10.20886/jsek.2012.9.1.1-11","read_url":"https://www.neliti.com/publications/29092/persamaan-allometrik-untuk-menduga-kandungan-karbon-jenis-meranti-shorea-teysman","access":"open","license":"CC BY-NC-SA","checked_at":"2026-11-02","status":"current"},"name":"S. teysmaniana peat swamp, ln(AGB) on DBH and wood density","output":{"quantity":"agb"},"expression":"exp(-1.03 + 2.08 * ln(D) - 0.51 * ln(rho))","published":{"expression":"exp(-1.03 + 2.08 * ln(DBH) - 0.51 * ln(WD))","units":{"DBH":"cm","WD":"g/cm3"},"variables":{"DBH":"D","WD":"rho"},"output_unit":"kg"},"taxon":{"level":"species","name":"Shorea teysmaniana","family":"Dipterocarpaceae","group":"broadleaf"},"region":{"scope":"site","countries":["ID"],"place":"Peat swamp forest, Barito Selatan, Central Kalimantan","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":20,"dbh_min_cm":7.3,"dbh_max_cm":29.2,"h_min_m":8.2,"h_max_m":20.92,"r2":0.99,"method":"log-log regression"},"evidence":[{"field":"expression","quote":"Ln(TAGB)= -1,03+2,08Ln(DBH)-0,51Ln(WD)","locator":"Tabel 3, row 4, p. 8"},{"field":"fit.n_trees","quote":"n=20","locator":"Abstract / Tabel 3"},{"field":"fit.r2","quote":"0,99","locator":"Tabel 3"}],"check":[{"inputs":{"D":10,"rho":0.5},"expected":61.12,"origin":"computed","note":"hand-computed from the published form"},{"inputs":{"D":25,"rho":0.6},"expected":374.57,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Table 1 gives DBH 7.30-29.20 cm and total height 8.20-20.92 m (n=20); the text says the models apply to 5-40 cm trees. R2 printed as 0,99 (rounded). The paper states no back-transform correction factor, so none is applied. Biomass is total aboveground (stem, branches, twigs, leaves). WD is wood density in gr/cm3 (oven-dry weight over saturated volume). Table 1 lists only 5 wood-density observations although Tabel 3 prints n=20."}