
Sökresultat:
467 Uppsatser om Stands - Sida 4 av 32
Hur väl skogsägare följer åtgärdsförslagen i skogsbruksplanen : en enkätundersökning
This rapport is about how often private forest owners follow the measures proposed in their forest management plan. The survey is made in cooperation with the forest-owners association Norrskog.
The private forest owners are relatively satisfied with the forest management plans and with the measures proposed. There are some differences between those who live on or near their property and those who live many miles away.
The forest owners who live on their property are those who follow the proposed measure of precommercial thinning to the largest extent. That group also values precommercially thinned Stands higher than thinned Stands.
The complete opposite is the case for the group that lives far away from their property.
Almost all of the respondents thought that the forest management plan would be or had been a good help in the decision making about the forest..
A literature study and survey of sycamore maple (Acer pseudoplatanus L.) in southern Sweden
Sycamore maple (Acer pseudoplatanus L.) is a common broadleaved species throughout Europe, however often
of minor interest to the forest sector. There is currently a lack of research on sycamore maple, and some of its
characteristics have throughout history contributed to a negative reputation in both literature and the forest
society. Since broadleaved species in general are of great importance to the forest sector in Europe and
presumably of enhanced significance in the future, deepened research is needed and particularly Swedish.
With a desire to hopefully increase the interest for sycamore maple, was the objective of the study to examine
the current status of the sycamore Stands in southern Sweden. The study was carried out both as a survey with
inventory field work and as a literature study. Parts of the latter mentioned is also presented in the
introduction.
The study shows that the majority of the sycamore Stands in Sweden are growing well, producing fairly high
qualities and volumes.
Lönsamhet i att avverka virkesrik fastighet innan försäljning
The purpose of this study is to find out the viability in performing final felling in Stands with high timber volume or if it´s more profitable to leave these Stands to the next owner. Will he or she pay more for the standing stock then the industry? The prices of forest-land have increased significantly over the last couple of years in Sweden and some properties seem to go higher than others. Is this because of higher standing stock volume or can a certain volume/hectare bring a higher price? Maybe a combination of both? This study is based on the the sale-statistics for 2012 from real-estate agency Areal.
Rissepareringens effekter på viltets nyttjandegrad av GROT
Successful forest regeneration is a prerequisite for sustainable forest management. Therefore, it is important to prevent browsing damage on the commercially important tree species Scots pine. In this study I have tested a new alternative way to increase the available amount of forage and increase the use of these resources by especially moose. The method is based on a slash treatment at harvest, where the accessibility 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 between conventional and slash treated Stands after final felling and commercial thinning in southern Sweden.
Vad styr förekomsten av sälg och asp? : en studie av olika beståndstyper inom Hamra kronopark, Dalarna
Aspen (Populus tremula L.) and goat willow (Salix caprea L.) are two important tree species in the aspect of nature conservation. Due to the elimination of forest fires, a former negative attitude towards deciduous trees in forestry and a strong herbivore pressure, these tree species have been negatively affected during the last fifty years. The aim of this study was to investigate whether the occurrence of aspen and goat willow could be related to either human impact or to site properties, such as ground moisture and vegetation type. A side study included an inventory of a number of cyanobacterial tree lichens on aspen and goat willow in order to try to relate the occurrence of these lichens species to stand history and stand properties.
The study was performed in Hamra State Forest in northern Dalarna. Nature reserves were compared with Stands in managed areas.
En jämförelse av sitkagranens (Picea sitchensis) och den vanliga granens (P. abies) produktion :
Sitka spruce (Picea sitchensis) is a tree species that have its natural distribution along the
West Coast of North America, from Alaska in the north to northern California in the south.
Sitka spruce is a typical coastal tree species that can reach heights up to 85 meters and occurs
in single pure as well as in mixed Stands.
The main purposes of this study were to describe the Sitka spruce growing characteristics and
the volume production in comparison to spruce (Picea abies). The possibility to predict future
volume production by using prognosis tools designed to be used on spruce were also studied.
The material that has been used in this study are permanent sitka trials established by the
Faculty of Forestry fixed Sitka trials and also material gathered in this study.
A literature study was also carried out in order to determine the Sitka spruce growing
characteristics.
Sitka spruce has a high adaptation and a high volume production on a broad scale of soil
types. The tree species is a pioneer species that has a fast early growth and in combination
with sharp needles it is less susceptible to animal browsing than spruce. The factor that is the
single most limiting factor for where the Sitka spruce can be planted is frost. This factor can
be limited by using plant material with a well-suited provenance.
According to the literature, the Sitka spruce has an average total volume production that is
between 20-40% higher than spruce.
Skötsel av ekholmar och eftersatta ekbestånd på låga boniteter : en fallstudie
This case study is made on assignment of Södra, region Öst, as a part of a campaign
promoting more active management of the oak forests in the region.
Hardwood trees of good quality, especially oak, has a high value due to that the sawn
material is highly estimated by the market. It is important that the Swedish oak forests
are managed in a proper way in order to meet the future demand. Södra has therefore
decided to increase the focus on oak in the Kalmar region and they would like to find
out if continues cover forestry (CCF) under certain conditions can be an appropriate
management model. The motive is to make use of the existing oak forests more
efficient, not just considering well managed forests but also the more neglected oak
forests, on poorer soils. Thus, the objective for this study is to examine if CCF is
appropriate method in the three stand types; broadleaved mixtures oak forest, oak islet,
and oak/spruce forest.
Existing management models were surveyed in the literature.
Anpassad skötsel - exempel på hyggesfritt skogsbruk i Mellannorrland :
Total protection is often the option chosen when protecting forests with high environmental values. An alternative to total protection is application of management regimes that do not interrupt continuity of tree cover. This study focuses mainly on continuous cover forestry (CCF) in forest Stands already protected. All objects are situated in the county of Jämtland in northwest Sweden.
The purpose of the study was to attain a greater knowledge about CCF practices.
Mässa tur och retur : En intervjustude, enkät och observation
This paper deals with the question of why companies choose to go on trade fairs and exhibition examines how the media works. The essay's main focus is on stand contractors and why those hired to produce other company Stands. The study is based on three interviews, a visit to a trade fair and a questionnaire survey. Together with the relevant literature is given a clear picture of how companies are thinking in their choice of attending the fairs, but also why stand contractors are involved in the process. We concluded that some companies do not know why they participate in fairs and many feel compelled to contribute to not be forgotten in the market.
Digitala fotogrammetriska arbetsstationer för skoglig flygbildstolkning :
SCA Skog has taken the initiative to this Master?s thesis. Today SCA Skog has a great need to update their informtion on young forest Stands across large areas. Traditional field inventory methods for updating stand databases are expensive and time consuming. However, the inventory could be made more efficient if stand boundaries and stand characteristics are derived from aerial photographs.
Skötsel av älgskadade bestånd :
Sweden has today the highest moose (Alces alces) population in the world. The population has been very high since the late seventies and in the beginning of the eighties there was a big ?moose explosion?. The main food source for moose during the winter is young pine (Pinus sylvestris) and birch (Betula spp.). The high moose population has therefore lead to high damage on pine forests over big areas.
Risken för spridning av röta vid förröjning i granskog i södra Sverige :
Root rot causes large economical losses for Swedish forestry. The 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 accessibility and sight within the stand, and so to increase the mean stem´s volume during the first conventional thinning.
The aim of this study was to examine how late PCT is performed, its spatial extent and if it aids the spreading of root rot. The study was limited to encompass late PCT before first conventional thinnings in spruce Stands in southern Sweden.
Samples of spruce stumps were taken from four Stands where late PTC had been carried out.
Attityder och kunskaper kring hållbara matvanor
The Purpose of this study was to examine what knowledge and which attitudes there are about environmental friendly food in the society. To do so an essay were constructed and distributed to five different working places. Altogether there were 50 essays distributed and 43 were returned. The main result; the respondents think that it is important for people to learn how to consume food in a more environmentally friendly way. The majority of the respondents recognized the eco-label KRAV but the European eco-label and Demeter were not recognized in a less extent.
Ifrågavarande kronopark skall benämnas Skatan : en skogshistorisk analys av Ekoparken Skatan
People have utilised and influenced the boreal forest for many centuries. Prior to the industrial revolution during the 19th century, however, human use primarily only had a low impact on the forest. When the timberfrontier swept over the country, the Swedish forests came to change for ever. The study site for this thesis is situated in the northern part of the county of Västerbotten, Sweden, and has previously been a National forest. Today the area is an ecopark and the land is owned by the forest company Sveaskog.
Björkbarksextrakt, BBE : en lönsam lösning på betningsproblematiken?
The calculations in this thesis are evaluating the profit as a consequence from treating young Stands of pine in Sweden with birch bark extract, BBE. Treatment is to be done with the object to lower or fully reduce the moose browsing on pine. The study is made in three versions. The results from each version separately will follow below.
Version I.: The size of the moose population is in no way affected by the reduced resources of food as a consequence of large scale treatment with BBE on pine. Results show profit at a 3 percent level of interest with the exception of treatment program with more than 4 treatments all together and with the exception of Västerbottens Län with an early first treatment.
Version II.: The population of moose decrease from 10 to 5 individuals per 1000 ha as a consequence from large scale treatment with BBE on young pine Stands.