broj: 11-12/2004        pdf (33,1 MB)



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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


 
ORIGINAL SCIENTIFIC PAPERS
     
Margaletić, J. UDK 630* 451 + 136 (001)
Population Dinamics of Woodland Rodents in Croatia     pdf     HR     EN 599
Beuk, D. UDK 630* 156 + 903 (001)
Losses Within the Big Game Stock in The Spačva Basin as Consequence of the Agression on the Republic of Croatia     pdf     HR     EN 609
Trinajstić, I. UDK 630* 188 (001)
Nomenclatural-Syntaxonomic Analysis of Silver Birch (Betula pendula Roth) Forests in Croatia     pdf     HR     EN 627
Šporčić, M., Martinić, I. UDK 630* 303 + 308 (001)
Forest Contractors in Croatia     pdf     HR     EN 633
Ballian, D. UDK 630* 165 (001)
Microsatellite DNA Variability of Populations of Wild Cherry (Prunus Avium L.) from Central Bosnia     pdf     HR     EN 649
Poršinsky, T., Krpan, A. P. B., Stankić, I. UDK 630* 363 (001)
Efficiency of Mechanical Felling and Processing in Soft and Hardwood Broadleaved Stands – Part 4: Environmental Suitability of Mechanical Felling in Natural Stands     pdf     HR     EN 655
Zečić, Ž., Krpan, A. P. B., Stankić, B. UDK 630* 375 (001)
Skidding of Roundwood by Tractor Timberjack 240 C from Regeneration Felling in Condition of Forest Office Velika Pisanica     pdf     HR     EN 671
Summary: This paper deals with the research of the skidder Timberjack 240 C in timber skidding in regeneration fellings at working sites in hilly conditions. The achieved effective time in final felling is 81.44 % of total time consumption. The average loads per cycle range between 4.24 m3 in final felling. The achieved daily output is on the average 64.11 m3/day.The average travel speeds of unloaded tractors are 4.96 km/h and of the loaded ones 3.55 km/h. The travel speed is mostly affected by longitudinal slopes of strip roads and by the type of skidding considering the slope gradient. The average speeds of pulling the choker are 1.33 km/h and of load winching 1.03 km/h respectively.
Total cycle time scheduled for the tractor at the site, considering the skidding distance, ranges between 20.25 min and 35.26 min. For a distance of 300 + 100 m total cycle time is 27.76 min at the worksite. Time standard at the site A ranges between 4.77 min/m3 and 8.31 min/m3. At a distance of 300 + 100 m, the time standard is 5.95 min/m3 respectively. Daily output at the site ranges between 100.54 m3/day and 57.75 m3/day. For a distance of 300 + 100 m a higher output is achieved at the site and it amounts to 80.63 m3/day. In the final felling for a winching distance of 100 m to 700 m at the site, the costs range between 18.61 HRK /m3 and 32.41 HRK /m3. For the winching distance of 300 + 100 meter, the costs amount to 23.21 HRK /m3 for the site. Research results confirm the skidders work area, as the highest efficiency and the lowest cost are achieved in final felling.

 
REVIEWS
     
Rubin, G. UDK 630* 652
Evaluations of Forests – Practical Access     pdf     HR     EN 679
Gračan, J., Kajba, D., Perić, S., Idžojtić, M., Ivanković, M., Marjanović, H. UDK 630* 165
Euforgen Forest Genetic Resources Programme Fourth Euforgen Steering Committee Meeting     pdf     HR     EN 689

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