Estimating the tree bole volume of Brutian pine (Pinus brutia Ten.) and Taurus cedar (Cedrus libani A. Rich.) using paracone and centroid methods in Turkey
DOI:
https://doi.org/10.29329/JofBS.2021.349.02Keywords:
Paracone model, Centroid sampling, Tree bole volume, Local volume tablesAbstract
In this study, the most suitable methods for estimating tree bole volume were tested on seventy-six Brutian pine (Pinus brutia Ten.) and fourty-five Taurus cedar (Cedrus libani A. Rich.) trees. The volume of each tree bole was predicted by utilizing Paracone model, Centroid sampling, Huber formula, and local volume table (LVT) for Brutian pine and Taurus cedar. Volume predictions were then evaluated with “true” volume of every tree that was calculated through summing up the volumes of sub-sections (approximately one meter in length) using Smalian’s formula. The mean errors of Paracone model estimation of the tree bole volumes were not significant for both Brutian pine and Taurus cedar and less than those obtained from the Centroid sampling, Huber’s formula, and LVT. When four formulas were compared, the Paracone method valuation was clearly more accurate, and mean error of Paracone method was not significant at 0.05 confidence level.
References
Forslund, R. R. (1982). A Geometrical Tree Volume Model Based on the Location of the Centre of Gravity of the Bole. Canadian Journal of Forest Research, 12(2), 215-221. https://doi.org/10.1139/x82-033
GDF (2019). Forestry Statistics. https://www.ogm.gov.tr/ tr/ormanlarimiz/resmi-istatistikler
Gray, H. R. (1956). The form and taper of forest-tree stems. Oxford: Imperial Forestry Institute, University of Oxford.
Gregoire, T. G., Valentine, H. T., & Furnival, G. M. (1986). Estimation of Bole Volume by Importance Sampling. Canadian Journal of Forest Research, 16(3), 554-557. https://doi.org/10.1139/x86-096
Patterson, D. W., Wiant Jr, H. V., & Wood, G. B. (1993). Comparison of the Centroid Method and Taper Systems for Estimating Tree Volumes. Northern Journal of Applied Forestry, 10(1), 8-9. https://doi.org/10.1093/njaf/10.1.8
Ueno, Y. (1978). On the Nature of Form Factors and Its Application for Stand Volume Estimation (I). Journal of The Japanese Forestry Society, 60(3), 87-93. https://doi.org/10.11519/jjfs1953.60.3_87
Wiant Jr, H. V., Wood, G. B., & Forslund, R. R. (1991). Comparison of Centroid and Paracone Estimates of Tree Volume. Canadian Journal of Forest Research, 21(5), 714-717. https://doi.org/10.1139/x91-099
Wiant Jr, H. V., Wood, G. B., & Gregoire, T. G. (1992). Practical Guide for Estimating the Volume of a Standing Sample Tree Using either Importance or Centroid Sampling. Forest Ecology and Management, 49(3-4), 333-339. https://doi.org/10.1016/0378-1127(92)90144-X
Wiant Jr, H. V., Spangler, M. L., & Baumgras, J. E. (2002). Field Note-Comparison of Estimates of Hardwood Bole Volume Using Importance Sampling, the Centroid Method, and Some Taper Equations. Northern Journal of Applied Forestry, 19(3), 141-142. https://doi.org/10.1093/njaf/19.3.141
Wood, G. B., & Wiant Jr, H. V. (1990). Estimating the Volume of Australian Hardwoods Using Centroid Sampling. Australian Forestry, 53(4), 271-274. https://doi.org/10.1080/00049158.1990.10676087
Wood, G. B., Wiant Jr, H. V., Loy, R. J., & Miles, J. A. (1990). Centroid Sampling: A Variant of Importance Sampling for Estimating the Volume of Sample Trees of Radiata Pine. Forest Ecology and Management, 36(2-4), 233-243. https://doi.org/10.1016/0378-1127(90)90027-9
Wood, G. B., & Wiant Jr, H. V. (1992). Test of Application of Centroid and Importance Sampling in a Point-3P Forest Inventory. Forest Ecology and Management, 53(1-4), 107-115. https://doi.org/10.1016/0378-1127(92)90038-B
