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Znanstveno-stručno i staleško glasilo
Hrvatskoga šumarskoga društva
Journal of Forestry Society of Croatia
      Prvi puta izašao 1877. godine i neprekidno izlazi do današnjeg dana
   ISSN No.: 0373-1332              UDC 630* https://doi.org/10.31298/sl
upute autorima
WEB EDITION
ARHIVA ČASOPISA


HRČAK


 
EDITORIAL
     
Uredništvo
Should forest pay for everything?     pdf     HR     EN 5
 
ORIGINAL SCIENTIFIC PAPERS
     
Tomislav Poršinsky, Vlado Petreković, Andreja Đuka UDK 630* 523 (001)
https://doi.org/10.31298/sl.144.1-2.1
Bark thickness of wild cherry in timber scaling     pdf     HR     EN 7
Summary
Bark Thickness of Wild Cherry in Timber scaling
The bark is the outer shell of the tree, and it is made of the outer and inner segment. Out of all bark features, the most important is its thickness and share in the volume of trees and processed logs. In the process of timber harvesting, during scaling of processed logs, in Croatian forestry, two-entry tables (wood species and diameter over bark) are used for deduction of double bark thickness that are not the result of a scientific research. This paper aims to investigate bark features of wild cherry (Prunus avium L.) concerning 1) dependence of double bark thickness on the diameter of roundwood with bark, 2) dependence of bark share on the diameter of roundwood.
The research of bark features of wild cherry has shown as follows:
Þ the dependence of the double thickness of the bark on the diameter of roudwood with bark is equal to the regression analysis, the growing exponential curve of form y = a xb, which in wild cherry with 62.7% explains the variability of the double thickness of the bark on the diameter of roundwood with bark,
Þ by rounding down the value of double bark thickness to the nearest centimeter, the research showed that the existing application of the bark deduction table overestimates the double thickness of the bark of wild cherry in specific diameter ranges of roundwood,
Þ simulation analysis of the volume (value) differences of the logs in terms of bark thickness deduction in Croatian forestry and considering the two ways of deducting bark thickness during timber scaling resulting from this study (due to »a full centimetre« and due to the share of bark in volume) have shown possible savings in the process of timber scaling,
Þ by deducting the bark according to its share in the volume of roundwood, the savings are larger and include a wider range of log diameter compared to »a full centimetre« deductions.

Key words: deduction of double bark thickness; share of bark; log; wild cherry
Stjepan Kvesić, Dalibor Ballian, Mirzeta Memišević Hodžić UDK 630* 164 (001)
https://doi.org/10.31298/sl.144.1-2.2
Leaf variability of field maple populations (Acer campestre L.) in Bosnia and Herzegovina     pdf     HR     EN 15
Osman Mujezinović, Kenan Zahirović, Milivoj Franjević, Mirza Dautbašić UDK 630* 443 (001)
https://doi.org/10.31298/sl.144.1-2.3
Trophic preferences and influence of beech weevil on the damaged leaf area of beech trees in Bosnia and Herzegovina     pdf     HR     EN 27
Sercan Gulci UDK 630*360 (001)
https://doi.org/10.31298/sl.144.1-2.4
Productivity of a farm tractor with single drum winch during whole-tree timber extraction     pdf     HR     EN 35
Vania Kachova, Angel Ferezliev UDK 630*261 (001)
https://doi.org/10.31298/sl.144.1-2.5
Improved characteristics of Populus sp. ecosystems by agroforestry practices     pdf     HR     EN 45
 
PRELIMINARY COMMUNICATION
     
Natalie Levandovska, Jaromir Kolejka, Božena Šera, Hubert Zarnovičan UDK 630* 270 + 907
https://doi.org/10.31298/sl.144.1-2.6
The recreational potential of urban forests – an application of the assessment method     pdf     HR     EN 53
 
PROFESSIONAL PAPERS
     
Zvonimir Ištvan UDK 630* 902
https://doi.org/10.31298/sl.144.1-2.7
145 year of forestry in Podravina     pdf     HR     EN 65
Drago Biondić UDK 630* 762 + 799
https://doi.org/10.31298/sl.144.1-2.8
Integral performance index of small and medium wood industrial financial products     pdf     HR     EN 75

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