- ORIGINAL ARTICLE
- Published:
Heart splitting at crosscutting of eucalypt logs
Journal of Wood Science volume 50, pages 1–6 (2004)
Abstract
The occurrence of heart splitting during the crosscutting of logs was discussed in relation to the released strain on Eucalyptus spp. logs. The strains released in the longitudinal and tangential directions were measured by the strain-gauge method and were correlated with the length of the heart split measured on the same logs. There were differences in the longitudinal strain; however, no significant correlation was found with the diameter that could be converted to a mean annual increment (i.e., a relation with the growth rate). The initial splits expand with the time after felling. The longer the initial split, the longer is the length 1 week after felling. The split length was significantly smaller at the butt end of the first log of every tree than at the other end, but there were no significant differences between the split length at the top of the first logs and at either end of the second logs, although there were differences among individual trees. The length of the heart split correlated with the released strain near the pith, which was estimated using Kubler’s equation. The longitudinal released strain measured on the surface of logs is a good indicator of the heart splitting when crosscutting logs.
Author information
Authors and Affiliations
Corresponding author
Additional information
Part of this paper was presented at the 52nd Annual Meeting of the Japan Wood Research Society
Rights and permissions
About this article
Cite this article
Okuyama, T., Doldán, J., Yamamoto, H. et al. Heart splitting at crosscutting of eucalypt logs. J Wood Sci 50, 1–6 (2004). https://doi.org/10.1007/s10086-003-0533-y
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10086-003-0533-y