13 伐採木求積公式の研究
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A. On the asumption that the volume of cut logs can be shown practically by the following formula, experimental formulas were led from the research data of 292 logs of SUGI, all being 4 meters long but various diameters.V=(a+bG_0+cG_1dγ+eG_2+fG_n)[figure]The reason of assuming the above formula are as follows : 1,Most of the cubing formulas of cut logs used in the past are the abbriviated forms of the above.2,As suggestible by the disgrams of V, G_0,G_1,γ, G_2,G_n, volume (V) can be shown by the formula : V=a+bG_i (G_i : G_0,G_1,γ, G_2,G_n)B. Among the following experimental formlas including one section out of five, there is no significant difference for 1% leyel of significance.[table]C, Among the following experimental formulas including 2 sections out of 5,there is no significant difference for 1% level of significance.V=+0.000465+0.438407G_0+3.489420γ S=0.01867 V=+0.003939+0.501401G_0+3.606105G_2 S=0.01883 V=-0.001393+1.959273G_1+2.185832G_2 S=0.01939 V=+0.003024+1.762613G_1+2.265029γ S=0.02147 D. Among the following experimental formulas including 3 sections out of five, there is no significant difference for 1% level of significance.V=+0.001744+0.4281G_0+1.7929γ+1.8298G_2 S=0.0215 V=+0.000490+0.3468G_0+1.3167G_1+2.3593G_2 S=0.0130 V=+0.002420+0.4089G_0+2.5212γ+1.1499G_n S=0.0148 E. The experimental formula including all 5 sections is : V=0.000909+0.3487G_0+0.8054G_1+1.1935γ+1.3360G_2+0.3619G_n S=0.010619 F. When the volumes accounted by Huber's formula Smalian's formula, Simony's formula. Shiffel's formula, and Wada's formula are compared with the volume by the experimental formulas including the same section or sections that the above various formulas have, there are significant difference for 1% or 5% level of significance, as follows : [numerical formula][numerical formula][numerical formula][numerical formula][numerical formula]G. For the above reason, it seems to be necessity to amend the coefficient of the cubing formulas used in the past to aply to the logs of SUGI, 4 meters long.
- 一般社団法人日本森林学会の論文
- 1952-02-25
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