@article{oai:kpu.repo.nii.ac.jp:00004683,
 author = {大隅, 真一 and OSUMI, SHINICHI},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Sep},
 note = {林分材積調査の功程を調査するため, Snap-reading法による時間分析の応用を試みた。適用せられた林分材積調査法は次の3種である。(1)毎木調査法, (2)円形プロットによる標本調査法, (3) W. Z. P.による標本調査法。調査は面積2.6ha, 本数1982本, 44年生のスギ人工林で行われた。作業人員は全ての作業に対し3名であった。毎木調査法。上り法は下り法に比べて僅かに多くの時間を要するが, 測り落し本数ははるかに少なく, 全体として優れている。Blume-Leissによる樹高測定は, 移動時間も含めて1本当り約2分を必要とする。円形プロット法。プロットの大きさは100m^2である。プロット間の距離測定, 円形プロットの作成および樹高測定にSpiegel-relaskopが用いられたが, 非常に有効であった。1プロット当り所要時間は11分51秒であった。W. Z. P.による標本調査法。標本点の決定, 断面積測定および形状高の測定にSpiegel-relaskopが用いられた。本作業は非常に能率的で, 1標本点当り5本の標本木につき形状高の測定がなされたにもかかわらず, 所要時間は1標本点当り21分11秒であった。形状高の測定には1本当り2分を必要とする。林分材積調査に対するSnap-reading法の適用は充分有効である。, 1. In order to study the efficiencies of the following methods of timber cruise, the author applied the time analysis by the snap-reading method to them : (1) One hundred per cent cruise, (2) Sampling method with circular plots, (3) Sampling by Winkelzahl method. All the methods were practised by a three-men crew in an evenaged stand of Cryptomeria japonica 44 years old, covering 2.6 ha. and containing 1,982 trees. 2. In the one hundred per cent cruise, two methods were compared : one consists in ascending the slope measuring the diameters at breast height of the trees, and the other in descending the slope. The first required slightly more time than the second, while the calipering of 82 trees was omitted in the first method whereas in the second method these were 138. The height measurements with the Blume-Leiss hypsometer for 100 sample trees gave about 2 minutes as the average time for a tree, including the time for walking between trees. 3. In the sampling method with circular plots, 21 100 square meter plots were distributed in a systematic manner through the stand, and the height measurement was practised on 3 trees chosen at random in each plot. The "Spiegel-relaskop" of Bitterlich was available for the determination of distance between plots, for setting up the circular plots and for the height measurement. On the average, 11′58″were needed for the inventory of one plot, including the time for walking between plots and for the height measurement. 4. In the sampling by the Winkelzahl method, the Spiegel-relascope was more widely used than the former : for locating sample points, for the estimation of basal area per hectare and for the form-height measurement of 5 sample trees which were assigned in each plot. This method was highly efficient and required merely 21′11″per sample point, including the time of walking between sample plots and the time expended for the form-height measurement of the sample trees. The form-height measurement needs about two minutes per tree. 5. The snap-reading method is satisfactorily useful for the time study of the forest inventory.},
 pages = {87--97},
 title = {林分材積調査の時間分析(林学部門)},
 volume = {12},
 year = {1960},
 yomi = {オオスミ, シンイチ}
}