{"id":"kang-2016-root-pow-dh","source":{"id":"kang-2016","citation":"Kang, M.S., Jang, K.S., Son, Y.M., et al. (2016). Allometric Equations and Biomass Expansion of Yellow Poplar (Liriodendron tulipifera) in Southern Korea. Journal of Korean Forest Society, 105(4), 463-471.","title":"Allometric Equations and Biomass Expansion of Yellow Poplar (Liriodendron tulipifera) in Southern Korea","authors":["Kang, M.S.","Jang, K.S.","Son, Y.M."],"year":2016,"venue":"Journal of Korean Forest Society","doi":"10.14578/jkfs.2016.105.4.463","url":"https://doi.org/10.14578/jkfs.2016.105.4.463","read_url":"http://e-journal.kfs21.or.kr/journal/view.asp?key=3493107","access":"open","license":"CC BY-NC 3.0","checked_at":"2026-11-02","status":"current"},"name":"Liriodendron tulipifera Root W = aD^b H^c (Table 11)","output":{"quantity":"bgb"},"expression":"0.012 * D^2.688 * H^(-0.139)","published":{"expression":"0.012 * DBH^2.688 * H^(-0.139)","units":{"DBH":"cm","H":"m"},"variables":{"DBH":"D","H":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Liriodendron tulipifera","family":"Magnoliaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["KR"],"place":"Suwon (Gyeonggi), Jangseong and Gangjin (Jeollanam-do), South Korea","biomes":["temperate"]},"stand":"plantation","fit":{"r2":0.863,"method":"regression in SPSS 19.0 (power forms fitted on log-transformed data)"},"evidence":[{"field":"expression","quote":"Root 0.012 2.688 -0.139 0.863","locator":"Table 11 (W=aD^bH^c)"}],"check":[{"inputs":{"D":15,"H":12},"expected":12.3171,"origin":"computed","note":"computed from the Table 11 coefficients"},{"inputs":{"D":30,"H":22},"expected":72.9603,"origin":"computed","note":"computed from the Table 11 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"W = dry weight in kg (Table 7 in kg), D = DBH in cm, H = tree height in m. The paper prints no correction factor, so none is applied. Only 21 of the 40 trees were excavated for roots; the paper does not state n or the DBH/height range for this equation, so they are omitted."}