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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
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UVODNI ČLANCI
     
Matić, S.
The 150th Anniversary of the Croatian Forestry Society     PDF 387
Prpić, B.
The 120th Anniversary of the Forestry Journal     PDF 391
 
IZVORNI ZNANSTVENI ČLANCI
     
Glavač, V. M. UDK 630* 161.48.001 (497.13)
On Blood Analysis of Forest Trees     pdf     HR     EN 393
Krpan, A. B. R., Petreš, S., Poršinsky, T. UDK 630* 822 : 469.001(497.13)
Research on the War-inflicted Damage on the Sessile-Flowered Oak and Beech Timber     pdf     HR     EN 399
Summary: In the Lipovljani sawmill 56 sessile-flowered oak logs and 63 beech logs
were examined. The mean log diameters were 33.3 cm and 40.6 respectively.
The oak length was 4.1 m, beech 4.5 m, mean volume 0.36 m3 and 0.58 m3 respectively.


The prevailing number of injuries (65.4 %) upon oak logs are located along
the first two length meters above groung, while 51.3 % of the damage is likewise
located on beech logs. Although log samples were chosen in the sawmill,
without knowing their original location in the trunk, it is clear that most logs
were processed from the bottom trunk parts.

The number of damage is mostly one, followed by two and three injuries
per one log. One to three injuries were found on 82.0 % of oak logs, 71.4 % on
beech. Ten injuries on one log has so far been the biggest number of injuries.

In the oak logs we found 133 foreign bodies, of which 91.7 % were the most
harmful metal projectile fragments. Steel balls from the VBR-projectiles were

3.8 "/<>, infantry ammunition 4.5 %. In beech logs there were 185 foreign bodies,
of which 86.5 % were projectile fragments, 10.8 % balls and 2.7 % ammunition.
Average fragment size was 10.9 x 8.4 mm; ball diameter 10.0 mm; ammunition
7.62 mm.

The depth of penetration in the oak timber was between 30 mm and 135
mm, or average 71 mm; in beech logs, the depth ranged from 10 mm to 150
mm, average 49.6 mm.

Total volume of oakwoodsections was 0.266 m3, beechwood 0.299 m-\ The
section volume is 1.1 % of the net volume of both wood species. The depth of
penetration according to the valid standards for roundwood may influence the
timber quality, i.e. cause classification decrease.

In 216 injuries close to the metal foreign objects, we noticed change in
wood colour followed by various phases of wood rot. On 51 injuries, there was
only one change of colour. Oak timber injuries were all attacked by fungi,
while on beech logs 13 injuries were without visible destruction.

The depth of penetration was mostly within allowed limits of the valid standards
of mechanical injuries, therefore was the deterioration mostly associated
with fungi. The average financial loss due to quality decrease was 13.7 % of
log value according to the minimum price-list of the "Croatian Forests " Co. is necessary to establish the real forest area per age classes that are damaged
in war, and more precisely estimate the damaged wood volume in mature
and selection felling areas.

The task is to remove the damaged units from the production so that the remaining
stand could accumulate quality increment, avoiding long-term losses
in felling and primary wood conversion. In terms of financial means, activities
should be directed to international organizations and home users.

Wood processors should accept timber from war-damaged stands and use
them in the best sible way. Thus would total loss in the wood-processing complex
be smaller.
Filipan, T., Prpić, B., Ružinski, N. UDK 630* 114.2 : 114.5 : 161.48.001(497.13)
Damage Caused by Excessive N-compaunds in Forest Ecosystems and Drinking Water Supply     pdf     HR     EN 411
Cerovečki, Ž. UDK 630* 188.001 (497.13)
Thermophylus Beech Forests of Ivanščica Mountan in Croatia     pdf     HR     EN 419
 
PREGLEDNI ČLANCI
     
Kranjčev, R. UDK 630*145.7:181(497.13)
Protected nature - The Sands of the Drava Basin Today     pdf     HR     EN 425

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