{"id":"gwon-2014-gen-stem","source":{"id":"gwon-2014","citation":"Gwon, J.-H., Seo, H., Lee, K.-S., et al. (2014). Allometric Equations and Biomass Expansion Factors by Stand Density in Cryptomeria japonica Plantations. Journal of Korean Forest Society, 103(2), 175-181.","title":"Allometric Equations and Biomass Expansion Factors by Stand Density in Cryptomeria japonica Plantations","authors":["Gwon, J.-H.","Seo, H.","Lee, K.-S."],"year":2014,"venue":"Journal of Korean Forest Society","doi":"10.14578/jkfs.2014.103.2.175","url":"https://doi.org/10.14578/jkfs.2014.103.2.175","read_url":"http://koreascience.or.kr/article/JAKO201424635095328.pdf","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Cryptomeria japonica Generalized stem (wood + bark) (log10, Table 4)","output":{"quantity":"stem_biomass"},"expression":"10^(-0.3799 + 1.7892 * log10(D))","published":{"expression":"10^(-0.3799 + 1.7892 * log10(DBH))","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Cryptomeria japonica","family":"Cupressaceae","group":"conifer"},"region":{"scope":"site","countries":["KR"],"place":"Samdong-myeon, Namhae-gun, Gyeongsangnam-do, South Korea","biomes":["temperate"]},"stand":"plantation","fit":{"n_trees":10,"r2":0.71,"method":"log10-log10 least-squares regression (SAS Proc Reg)"},"evidence":[{"field":"expression","quote":"log10Y=a+blog10X [Y = dry weight (kg); X: DBH (cm)]","locator":"Materials and Methods 2"},{"field":"expression","quote":"Generalized equations: Stem (kg) -0.3799 1.7892 0.71 0.005","locator":"Table 4"},{"field":"fit.n_trees","quote":"5본을 선정하였다","locator":"Materials and Methods 2 (5 felled trees per stand density)"}],"check":[{"inputs":{"D":20},"expected":88.6958,"origin":"computed","note":"computed from the Table 4 coefficients"},{"inputs":{"D":35},"expected":241.4052,"origin":"computed","note":"computed from the Table 4 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"log10(Y) = a + b*log10(X); the paper prints no correction factor, so none is applied. Pooled over both stand densities (n = 5 + 5). Sample-tree DBH range is not printed, so none is given."}