136 uppsatser · sida 4 av 10
simulering i Heureka med olika skötselprogram
Stands where pre commercial thinning has been ignored or inadequate often tend to have high stem density and low average diameter when they reach heights of thinning. In such stands, it can often be expensive to do a conventional pulpwood harvest as a first thinning. This study …
… spread of root rot can partly be prevented by treating the spruce stumps in thinnings. Late pre-commercial thinning (PCT) is one of the forestry measures where stump treatment is not used. Late PCT can be defined as: The act of cleaning the stand with the aim of improving …
en ekonomisk analys av olika gödslingsstrategier för ett skogsinnehav i norra Sverige
… based on the theory that fertilization should be carried out ten years before thinning or clear cutting because then the invested capital is not bound longer then necessary and the fertilization effect has been utilized. Among the programs included in the study, fertilization …
en jämförande studie av skördarkran med och utan horisontellt ledad vipparm
… the outer boom. This makes it possible to reach around residual trees, easing thinning work in dense stands. The aim of the study was to analyze if the use of a pivoting outer boom (POB) crane gave an increase in thinning production and if there were any differences in time …
Today Holmen Skog finds and selects suitable thinning stands using data on upper height and basal area. These figures are often based on basic forest data that has been updated with the help of growth prediction models. The problem is that these figures are not always correct …
en tidsstudie av Vimek 608 BioCombi i contortabestånd
… The aim was to study the productivity of Vimek 608 BioCombi in forest fuel thinning of Lodgepole pine and to calculate the economy of the harvesting and estimate the thinning quality. The time study was performed in Åmarken in the county of Västerbotten. The study area had 4724 …
a comparison between high and low Norway spruce and birch stumps : a measuring of the efficacy of Phlebiopsis gigantea stump treatment
… northernhemisphere, including Sweden. New results indicate that pre?commercial thinnings could be at riskfor Heterobasidion spp. infections. Since no wood usually is used from pre?commercial thinnings,there would not be any timber losses from leaving high stumps instead of low …
In today´s forestry, assessments of needs for thinning are based on basal area measurements. This is an indirect measurement. The approach and the developed assessment tables are based on an assumed production forest, which implies that management proposals in stands that …
… trend in the silviculture measures in young stands showing bad pre commercial thinning result, returning to the thinning levels reached in times when pre-commercial thinning obligations still existed. A well growing forest demands thoroughly planned silviculture measures.
… of slash as forage is increased during final felling or commercial thinning by gathering the slash and putting the Scots pine slash on top of the slash piles. This study has compared the availability of forage, the amount of browsed biomass and the number of fecal pellet groups …
… includes a review of scientific studies of tree injuries following mechanized thinning. Interviews have been made with drivers of single grip harvesters and forwarders in forest thinning and a number of essential factors have been identified as the most important to take into …
I Sverige finns ca 1,2 miljoner hektar skog som bedöms ha omedelbart röjningsbehov. Skog där röjningen uteblir eller är svag kan komma att klassas som konfliktbestånd. I konfliktbestånd är stammarna många och diameterspridningen stor och dessa kan då behövas underröjas innan …
This thesis is about the effects of fertilizing and thinning on furniture timber from redwood. Interviews of furniture manufactures have been made and observing of timber from the Swedish fertilizing and thinning trails. The result from the interviews showed which properties …
en studie på Korsnäs Skog och Bergvik Skog AB i västra Dalarna
… with information concerning their younger forests, mainly those in pre-thinning stage. They were divided into large, heterogeneous stands with often poor stand data quality. In 2006 an aerial photo interpretation of the young forests was conducted to fix these problems …
… decreased, more consideration must be taken to closely situated stands. Late thinning in higher border zones ought to be avoided and final felling should instead be carried out earlier. The silviculture method, suggested to reach more stable edges of the stands, is about …
