44 uppsatser · sida 1 av 3
beskrivning av en gallringsmodell för granskog som tillämpas på Trolleholms Gods
… estate of Trolleholm aims to extract stems with too broad ring width. The 3-4 first thinnings are carried out as thinning from above, where only the thickest trees are removed. The internal distance may not fall below 5-7 meters depending on the number of thinning (short …
a look at Finnish and Swedish forest practices and their applicability in British Columbia’s Interior forests
… by maturity level, with a particular interest for stands suitable for a first thinning. A total of 957 ha have thinning opportunities, with an average of 120 m3/ha available for harvest during at first entry; a total of 102 458 m3 would be made available with thinnings. Partial …
… this work is to demonstrate how the net present value (NPV) at the time of the first thinning depends on the spacing after pre-commercial thinning, and show how net value from first thinning in same stand is influenced. This study is performed with models based on non-distant …
… the structure in conflict-stands and to evaluate alternative treatments at the first thinning. The first strategy focused on the future development of the stand and was mainly carried out as a thinning from below. The second strategy focused on maximizing the economical profit …
i stormen Pers fotspår
… purpose of this thesis was to verify this statement. Data was collected from first- and second thinnings at Boxholms Skogar AB, Östergötland. In first thinnings data was collected from both spruce and pine stands and second thinnings only data from spruce stands was collected …
… and a minimum of silviculture measures such as thinning. The species was first brought to Sweden as an attempt to avoid a predicted shortage of wood fibre. Today, stands with high-quality lodgepole pine are intended for production of both pulp wood and timber and are managed …
… impact, snow pressure and density of stand. The investigation is regarding the first commercial thinning of pine stands, after pre-commercial thinning that was well conducted. The investigation area was located near Katrineholm, Sweden. The measurements that were measured were …
… of small trees was evaluated. The study was conducted in a 32-year old first-thinning-stand dominated by spruce. A factorial block design was used, in which four combinations of thinning and preclearance were randomly assigned to study units of 0.1 ha in size. In total, the …
… age has grown rapidly from the end of the 1990ies.During the years 1996-2005 first commercial thinning of lodgepole pine at SCA took place.The goal of the hereby presented study was to investigate the growth and stability in thosefirstly-thinned lodgepole pine stands a few years …
… thinning, and biomass is thus allowed to accumulate in these areas until first commercial thinning/harvest is carried out.
… studying the possibilities of harvesting biofuel assortments already in the first thinning. In this study the distribution of the biomass within lodgepole pine trees has been studied and taken into account for estimating the proportions of harvested assortments when using …
… way of financing the high cost of preparing dense stands for a profitable first conventional thinning. This concept can be labelled bioenergy thinning. The aim of this study was to quantify the productivity of a Vimek 404R light harvester with an accumulating Naarva-Grip cutting …
… wind damage in Norway spruce stands in South Sweden in relation to time of the first thinning and different pattern of strip roads (width, length and direction). The stands used in the study were selected among stands with a certain amount of wind damage and thus the results …
… was to 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 - …
… in the form of a fieldwork with 23 stands that had been chosen by sampling. First thinnings with a pine proportion > 50 % were selected. In this part a statistical comparison was made between the data that the machine drivers collected and the data that was collected during the …
