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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 the national forestry policy and strategy be modernized?     pdf     HR     EN 513
 
ORIGINAL SCIENTIFIC PAPERS
     
Jurij Marenče, Marijan Šušnjar UDK 630* 375 (001)
https://doi.org/10.31298/sl.143.11-12.1
Limiting forces and load masses during timber winching     pdf     HR     EN 515
Summary
The stability of a forest vehicle apart from the longitudinal and transversal stability angle implies the safety of tractor anchoring during timber winching. Timber winching is a dragging of timber assortmens on the ground from the stump to a forest vehicle equipped with the forest winch. At a certain limiting load and slope of the terrain, disturbance of the longitudinal stability of the forest vehicle with the winch is occured. In this case, the adhesion factor of skidder and tractor on the ground is an important indicator of the possibility of safe and proper timber winching.
The adhesion factor of the skidder during timber winching on the slope is detremined on the basis of the general expression of the adhesion factor on the skidder on the flat ground. Also, determined the dynamic model of the loading of the forest vehicle is presented during timber winching on the slope.
The results show the horizontal components of forces in the rope and the limiting masses of the loads during timber winching by skidder Ecotrac 120 V. According to the obtained values of the horizontal components of forces in the rope, it can be concluded that the stability of the vehicle, defined by the displacement of the vehicle backwards is the limitation of the timber winching.
The presented model of timber winching on the slope shows the basic principle for determining the limiting load masses and slope of the terrain, which can applied to all types of forest vehicles equipped with winch as well as easily be adapted to other conditions of timber winching at different positions of the vehicle and the direction of timber winching.

Key words: timber winching; tractor stability; dynamic model; limiting forces; load masses
Ivan Lukić, Željko Zgrablić, Vlatka Mičetić Stanković UDK 630* 453 (001)
https://doi.org/10.31298/sl.143.11-12.2
Presence of birch bark beetle (Scolytus ratzeburgi) in Croatia     pdf     HR     EN 523
Stjepan Kvesić, Dalibor Ballian, Mirzeta Memišević Hodžić UDK 630* 164 (001)
https://doi.org/10.31298/sl.143.11-12.3
Population variability of field maple (Acer campestre L.) in Bosnia and Herzegovina according to the fruit morphology     pdf     HR     EN 529
Deniz Güney, Zeki Yahyaoglu, Ali Bayraktar, Fahrettin Atar, Ibrahim Turna UDK 630* 165 (001)
https://doi.org/10.31298/sl.143.11-12.4
Genetic diversity of Picea orientalis (L.) Link populations in Turkey     pdf     HR     EN 539
 
REVIEWS
     
Ilija Đorđević, Nenad Ranković, Jelena Nedeljković, Jelena Tomićević-Dubljević, Dragan Nonić, Stjepan Posavec, Goran Češljar UDK 630* 934 + 676 (001)
https://doi.org/10-31298/sl.143.11-12.5
Mechanisms of financing the protected area management system in Serbia     pdf     HR     EN 549
 
PRELIMINARY COMMUNICATION
     
Nikica Ogris, Tine Hauptman, Maarten de Groot, Dušan Jurc UDK 630* 270 + 305
https://doi.org/10.31298/sl.143.11-12.6
Comparison of two methods for monitoring urban forests health     pdf     HR     EN 561
Ivan Pervan, Tena Radočaj, Tea Tomljanović, Miljenko Bujanić, Dean Konjević UDK 630* 134
https://doi.org/10.31298/sl.143.11-12.7
Determination of sex and morphological characteristics of fat dormouse (Glis glis) from the area of Dalmatian hinterland     pdf     HR     EN 571
 
PROFESSIONAL PAPERS
     
Damir Drvodelić, Milan Oršanić UDK 630* 232
https://doi.org/10.31298/sl.143.11-12.8
Selecting high quality forest seedlings of narrow-leaved ash (Fraxinus angustifolia Vahl) for regeneration and reforestation purposes     pdf     HR     EN 577

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