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Large amounts of birch-timber are imported to Sweden, from particularly the Baltic States, since the domestic production can’t support the pulp industry. The goal of this study was to show the potential of birch and the area’s most suitable for birch production. The study was …
Manuellt dödade träd vs självdöda
… four different locations in the municipality of Säffle. The trees, which were birch and alder, were all dead or dying and selected by three criteria, snags (as the reference tree type), girdling and high cut. A total of 15 trees of each type and measure were chosen. The trees …
Birch is the dominant deciduous tree species in Sweden but only 16 % is found in pure birch stands. The majority of the birch (51 %) is to be found in conifer dominated stands. Swedish forest land comprises approximately of 23 % mixed stands and one problem is that for mixed …
… positions. To test this hypothesis, a total of 100 stumps (50 spruces and 50 birches) were collected on four clear cuts between 5 and 7 years old near Uppsala, Sweden. Stump samples were paired to get a balanced dataset, each pair containing two stumps of the same tree species …
föryngringsresultat 7-10 år efter avverkning
… silvicultural method natural regeneration of spruce (Picea abies L. Karst) in birch (Betula pendula and pubescens) shelterwoods are to establish a new stand of tree seedl-ings and to protect those from high groundwater levels, frost damages and grass competition during its first …
en ekonomisk analys
… of spruce stands wind thrown during this storm. Can naturally regenerated birch (Betula sp.) be an alternative on these wind-exposed sites? This was the main question I was facing when discussilig the problems with Esben Möller Madsen, Söderåsens forest district. The aim of this …
a comparison between high and low Norway spruce and birch stumps : a measuring of the efficacy of Phlebiopsis gigantea stump treatment
… if the stump height, of both Norway spruce(Picea abies (L.) Karst.) and birch (Betula spp.), affects the susceptibility to Heterobasidion spp. aftera pre?commercial thinning is performed.The objective of this study was to investigate if there were any differences in infection …
skogshistoria och markutnyttjande i Vuornavagge under 300 år
… and other CMT's and by evidence of haymaking. Both Sami and settlers utilized birch-bark as roof cover, as evidenced by birch-bark peelings in the area. There is also a trail though the area, which was make when the settlers were trading with Norway. During an inventory of the …
arter och sorter
As birch is one of the most common trees in Sweden, and probably one of the easiest for someone who lives here to identify, it is interesting to note that most people do not know how variable the genus is and how widely it is distributed across the northern hemisphere. One can …
beståndshistorik i tolv nyckelbiotoper i Lycksele kommun
… by Norway spruce. In the other four key habitats deciduous trees, mainly hairy birch, were dominating. Five of the eight conifer stands showed evident traces from logging. The first loggings were performed in the second half of the 19th century as high-grading of the largest …
förekomst, substratkrav och effekter av skogsbrukets naturvårdsåtgärder
… is already extinct in southern Sweden. It develops in white rotted dead birch (Betula spp) and requires sun-exposed sites. The species is probably favoured by the effect of logging if the right methods are used. The aim of the study was to study the biology, habitat associations …
… with 33 cm diameter was 84.1 s for pine, 78.,8 s for spruce and 69.6 s for birch. To get the total time, 13.2 s has to be added when harvesting sites with terrain conditions GYL 211. The corresponding additional time for sites with terrain conditions GYL 233 was 24.5 s. The time …
… is to illustrate potentials and problems with withdrawal of quality timber of birch. The purpose is also to describe possible ways to increase available quantities of quality timber. Former research is reviewed as introduction. The study begins with a prognosis of future volumes …
… been done. We have discussed the effects on the soil surface pH-value with a birch (Betula spp. L.) admixture in Norway spruce stands (Picea abies L.).We have used data from the Swedish National Forest Inventory. We have also discussed how the wood production and the …
… between spruce medium height in young spruce stands and the number of birch stump shoots. The purpose was also to investigate if there are any correlation between the spruce height growth after clearing and the mean height of birch stump shoots. The reason for this investigation …
