224 uppsatser · sida 6 av 15
beräkningar med massaslutenhet
… detect forest in need of thinning by use of laser data and field samples. Only pine-dominated forest has been included in the study and height limits were set to match empirical restrictions. The study area was in the municipality of Älvsbyn (Latitude 65° 40´ N, Longitude 21° …
… regions in Västerbotten, Lapland and the coastal region. The forest types were pine, spruce, coniferous and mixed forests. Forest data (test area with associated sample tree) were retrieved from the national forest surveys database and then processed. Forests in need of …
en tidsstudie av Vimek 608 BioCombi i contortabestånd
… 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 trees/ha with an …
results 9-19 years after stand establishment
… on stand stem density, growth parameters and tree damages for Scots pine (Pinus sylvestris L.) after direct seeding and planting. The study also attempts to simulate growth until first thinning. Regeneration cost per hectare and tree was also evaluated for the different …
… openness and occurrence of look-out posts. The juveniles also preferred lichen-pine forest, which was most likely used for roosting. Furthermore, the juveniles showed a preference for south-facing slopes, where they could take advantage of thermal updrafts for flying. The …
föryngringsresultat efter 10 år
Maskinell markberedning följt av manuell plantering är den vanligaste föryngringsrutinen efter en föryngringsavverkning i Sverige. Många av de forskningsrön som dagens markberednings- och planteringsinstruktioner bygger på är baserade på äldre fältexperiment. Uppföljningar av …
… situated in a garden suburb in Eskilstuna, Sweden. The site was previously a pine forest but was, however, converted to a housing area around 2005. The garden comprises 1400 square meters and the soil is well-drained due to large amounts of construction gravel with a small …
a study about the production environment and international competitiveness of wood pellets from British Columbia
… increased production is more expensive. There exists a vast amount of mountain pine beetle killed trees in the province, about 700 million m3 of pine have been killed from 1998 to 2010, but the price of using whole trees for wood pellet production has been found more expensive …
… are used to treat our seedlings to avoid them from being attacked by pine weevils. With the forthcoming ban on insecticides alternative protective measures will have to be tested. Holmen Forest Ltd has aimed to find an alternative and have developed a mechanic pine weevils …
… I divided the actual stumpage sale volume following four categories which was pine, spruce, pine/spruce and seed trees. After that I picked out sixteen actual stumpage sale volumes from each category to be a part of the work. When I selected the actual stumpage sale volume to be …
… of exotic tree species. The choice finally ended up with lodgepole pines which were considered a fast growing tree species compared to our native tree species. Theambition for the new lodgepole pine stands were to run these with rotation periods of between 40-60 years, thus …
en modellsimulering av planteringsförbandets inverkan?
… To calculate heartwood volume modelings were carried out in four different pine stands with different spacings, 0,75, 1,25, 1,5 and three meters. The model indicates heartwood diameter (HWD) and is based on four explanatory variables, height (H), crown ratio (CR%), diameter …
technology of treatment and properties of modified wood
… the problem above. Several treatment options using this method onto Scots pine sapwood were tested. The results were evaluated by determining the dimensional stability, hydrophobic and mechanical properties of the treated wood. The studied treatments provided very good …
en studie av aspförekomst och tidigare markanvändning i fem län i Mellansverige
… and more than 10 % aspen or with 0 % aspen and more than 90 % spruce and/or pine. The percentage of agricultural land and forest were compared on the historical map and on the modern map to analyse how the land use had changed. The agricultural land had decreased in all the …
… harvester shows in average underestimation of the volume with Skogforsk Pine as a bark function. This means that the harvester isn´t the reason why the volume measured in the industry is lower, the fault is elsewhere. The study also indicates a need for a unique bark function …
