136 uppsatser · sida 2 av 10
… it is expected that 280 000 hectares of lodgepole pine will have reached thinning age on the domains of Svenska Cellulosa Aktiebolaget (SCA). Due to this the interest has grown rapidly for studying the possibilities of harvesting biofuel assortments already in the first …
… was to investigate how the radial growth of retained trees responds after thinning-from-above. The National Board of Forestry which initiated this study, was interested in whether there were differences in the growth-response between the tree species Scots pine (Pinus sylvestris …
The purpose of this study was to analyze the two thinning models: Bergvik Skog´s thinning model, which is based on total stems and dominant height, And Swedish forest agency´s thinning model which is based on basal area, habitat index, dominant height and recommended number of …
vilka åtgärder utförs och av vem?
… will be. There is plenty of forest land in immediate need of precommercial thinning in the country. Precommercial thinning activities in the Swedish forests have declined substantially since the early - 1990s, the abolition of duty precommercial thinning and forest owner's lack …
… due to previous management actions. The factors that could be controlled by thinning and had relevance of storm damage standpoint, according to the results were; the dominant height, volume, basal area weighted mean diameter and stand age at last thinning. In this study, these …
… over 60 years that have not been commercially thinned in. From pre-commercial thinning no conclusions for bears in general could be done, but males tend to select for stands that has been pre-commercial thinned. Forest management in the two study areas differs with the emphasis …
… to provide individual advice to private land owners about precommercial thinning. The study was conducted in Sala municipality and included forest owners that had received private individual advice from a Swedish Forest Agency consultant as well as forest owners that had not …
<em>En kvalitativ intervjustudie</em>
… how small-scale private forest owners make decisions regarding pre-commercial thinning. In 2015 it is ten years ago since the storm Gudrun hit the southern parts of Sweden and now large areas are in need of pre-commercial thinning. This study is built upon qualitative interviews …
… investigate the economical output of removing understorey trees before first thinning. Four treatments were studied. - no cleaning before thinning - cleaning of all trees less than DBH 5 cm before thinning - cleaning of all trees less than DBH 7 cm before thinning - cleaning of …
A high quality is highly requested in today’s thinnings, since these are the base for continued value development of the forests. Thinning quality often means a minimization of damages on soil, stems and roots during the cutting. One way to reach a high quality is to set up …
… purpose has been to investigate if it is possible to determine the need for thinning cuttings in young forest stands from aerial photographs. The main conclusions are that more advanced workstations are preferable to systems intended for less advanced and less frequent use. To …
Thinning is one of the most important silvicultural activities in middle aged forests, partly to minimize damages and partly because it leads to earlier harvesting revenues and increases the value of the remaining trees. There are many different indices used to describe stand …
… for forest fuels. One method to extract forest fuel from suitable commercial thinnings is the "long top method? (LT-method). With this method saw logs and non-delimbed tops are recovered, i.e. no pulpwood is recovered. Branches from delimbed sawlogs are not recovered and only …
konsekvensanalys av fyra hushållningsstrategier för contortatall
… of Lodgepole pine can be achieved by shifting final felling in time and by thinning. The consequences of four management strategies are analyzed using PlanWise, a software program for forest-level planning and analysis in the decision support system Heureka. If the harvest of …
har skogen återhämtat sig?
… mainly forests between 30-60 years that were ready for their first commercial thinning. After recommendations from the forest agency, sanitary fellings were made to trees that had more needle loss than 85%, a total of about 50 000 ha. Economic losses have been estimated to more …
