Comparison of the Centroid Method and Four Standard Formulas for Estimating Log Volumes

Authors : Hakkı YAVUZ

Pages : 597-602

View : 16 | Download : 9

Publication Date : 1999-11-01

Article Type : Research Paper

Abstract :Centroid Samling was tested on 21 logs of Ash insert ignore into journalissuearticles values( Fraxinus angustifolia subsp. oxycarpa);, 38 logs of Spruce insert ignore into journalissuearticles values( Picea orien-talis insert ignore into journalissuearticles values(L.); Link.);, and 33 logs of Beech insert ignore into journalissuearticles values( Fagus orientalis Lipsky.); all of which were measured in detail. The wolume of each log was estimated using Huber`s, Smalian`s, Newton, Riecke`s, Hosfeld`s formulas and Centroid Sampling. These estimates were compared with `true` volume of each log which was determined by aggregating the volumes of measured short sections insert ignore into journalissuearticles values(1 m.); using Smalian`s formula. The mean error of the Centroid estimate of the log volumes was not significant for Fraxinus angustifoliasubsp. oxycarpa, Picea orientalis insert ignore into journalissuearticles values(L.); Link., and Fagus orientalis Lipsky. and was less than those derived from Huber`s, Smalian`s, Newton-Riecke`s, and Hosfeld`s formulas. When three species were combined, the Centroid estimate was clearly more accurate, and its mean error was not significant at 0.05 probability level.
Keywords : Turk J Agric For, 23, 1999, 597 602 Turk J Agric For, vol 23, iss 6