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Article presents the assessment of growth and survival of silver fir seedlings planted under stand canopies constituted by common beech, European larch, Norway spruce, Scots pine and silver birch. Measurements were carried out in Karkonoski National Park (SW Poland) in 2001 and 2011. The tallest trees were grow− ing under the canopy of larch both in 2001 and 2011.
In the natural stands of the lower−montane zone in the 'Łopuszna Valley' Reserve (Gorczański National Park) consisting of beech, fir and spruce, a specific phenomenon was observed, which in other natural forests of the Western Carpathians occurred only occasionally. In the years 1981−2011, along with the increase in the proportion of beech in stands and in regeneration, which is now common issue in...
Presented study compares of the performance of Scots pine plantations established with container−grown and bare−root seedlings. Silvicultural assessment was based on the comparison of survival rate, defect differentiation as well as height and diameter growth of plants depending on the type of the planting material used for renewal. Results show faster growth of the container−grown plants but their...
Changes in the performance of harvesters of different power classes depending on the size of felled trees in thinned stands were assessed using a time study method. Results were compared to values from the catalogue for chainsaw performance. Comparison of the productivity of these two ways of harvest indicated that, depending on the volume of the felled tree, it was 6−8.2 times higher for harvesters...
The article describes courses organized for foresters in Poland in 1918−1939. It demonstrates the importance of such trainings as a supplementary education of forest rangers, timber sorters and resin extractors.
Douglas−fir is the most important introduced forest tree species in Poland. It is included into the frame of the breeding program that needs to test the selected objects. In the described trial the families of 14 plus trees are being tested. They are half−sib families from the open pollination. The significant differences between the families were stated in case of the diameter at the breast height...
The effect of the controlled mycorrhization with the fungus Hebeloma crustuliniforme, the application of fungicides (Bayleton 25 WP, Falcon 450 EC, Nimrod 250 EC and Siarkol Extra 80 WP) in the nursery and the use of two types of substrate (a mixture of sterilized Estonian peat with vermiculite and unsterilized Polish peat with perlite) on the growth, level of infestation by powdery mildew and form...
Since the beginning of 2000s the State Forests, National Forest Holding have taken actions to improve the timber sales system. Implementation of the on−line sales in 2006 was one of such actions. The analysis shows that this introduction improved the efficiency of the RDSF in Poznań. Financial profitability doubled, while the yield cash and property sales remained at a stable level.
Based on the literature and own studies, the biology and ecology of the fungus Inonotus obliquus (Fr.) Pilát as well as medicinal properties and practical application of its products were discussed.
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