This report was written as a final thesis within the Department of forest economics at the Swedish University of Agricultural Sciences as a completion of the M.SC Forestry programme. The aim of this study was to create a model that, with respect to given stock levels, temperature, fuel usage and fuel price, would identify the optimal levels for purchase of bio fuels, optimal levels of incineration of bio fuels and the sum of the present values of all costs. The model would be applicable for a larger district heating plant. Data regarding temperature were received from SMHI. Information considering fuel prices was taken from the Swedish Forest Agency and the facts about fuel usage were collected from a large district heating plant, located in the southwest of Sweden. For the temperature, a sinus curve was adapted to describe the temperature over a year.

Som skoglig sektorsmyndighet är det Skogsstyrelsens uppgift att omsätta regeringens skogspolitiska mål i praktiken. De behöver därför ha kunskap om deras arbete faktiskt ger effekter i skogsbruket. Ett verktyg för att undersöka effekter är utvärderingar. Genom en utvärdering kan Skogsstyrelsen se vilka effekterna är samt få ett underlag till att förändra och utveckla framtida projekt. Denna studie syftade till att utvärdera effekter hos deltagare avseende kunskapsinhämtning och användningsgrad samt deltagarnas upplevelse av vattenkvällarna i projektet Skogsbruk och vatten inom Landsbygdsprogrammet hos Skogsstyrelsen i Östergötland.

  Jag minns när man som liten var på besök hos mormors föräldrar i deras lägenhet i Sundbyberg. I vardagsrummet eller salongen hade de en figurin i glaskupa, där satt jag alltid och stirrade, försvann in i fantasins värld, iakttog scenariot med musicerande män i peruk och den sirliga färgrika vegetationen. Figuriner avbildar oftast människor eller djur, noggrant utarbetade, i en idealisk värld. Ett fryst ögonblick där allt är i harmoni, stråkarna ljuder och rusdrycken flödar i salongen, bönderna drar sina kärror och skördar glatt, människor och djur lever i symbios med varandra och naturen. En skönmålning som både innehåller och saknar problematik men är samtidigt en intressant tradition där jag kan frossa i referenser och uttryck, kitschiga motiv och inkonsekventa koncept. .

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.

Pulsatilla vernalis is one of several endangered plant species that benefit from wildfires and small scale disturbance events that repel competing vegetation and create open patches in the vegetation cover. Previous studies argue that Pulsatilla vernalis is decreasing in numbers due to vegetation changes associated with the decrease in wildfires, forest grazing and changes in forest management. In this study, 17 populations of P. vernalis were inventoried in order to examine if soil and/or vegetation structures affect the population structure of P. vernalis (i.e.

Kulturmiljövårdens hantering av de gröna miljöerna har länge varit bristfällig, vilket Visby vallgravar utgör exempel på. Park­området som sträcker sig utmed ringmuren från norr till söder ger idag ett till viss del naturpräglat intryck trots att det under slutet av 1800-talet genomgick omfattande planteringar och därmed i hög grad är medvetet gestaltat. Detta har medfört att kun­skapen om varför vallgravarna ser ut som de gör är otillräcklig. När Visby togs upp på UNESCO:s världsarvslista 1995 pekades vallgravarna ut som buffertzon. På ett kontrasterande sätt har man från kommunal sida på senare år utvecklat planer för exploa­tering både i och nära inpå vallgravsområdet.Undersökningen har syftat till att med Visby som exempel belysa hur gröna kulturmiljöer kan komma att tolkas på olika sätt när vi väljer att tillskriva dem särskilda tidslager och därmed bortse från andra.

Syftet med den här uppsatsen var att belysa frågan om hur många användare det behövdes för att uppnå en viss mättnad i en användbarhetsutvärdering för en specifik flash-applikation kallad My Garden. De aspekter som låg till grund för denna uppsats var brytpunkten i ökningen av unika fynd i korrelation med höga procentsatser. Med hjälp av den formativa utvärderingen och analysen av denna gick det sedan att ta reda på vilka problem (så kallade fynd) som upplevdes av användarna i gränssnittet. Resultatet av analysen resulterade i 95 unika fynd i tio användbarhetsutvärderingar. Resultatet visade följaktligen att för denna sorts utvärdering behövdes sju användare för att uppnå 93 % av alla unika fynd som hittades och därmed uppnå en slags mättnad i avklingandet av hittade unika fynd..

This study was performed in an afforestation experiment established 1982 on an abandoned peat harvesting area, Flakmossen, in the province of Värmland, SW Sweden. The experimen-tal design include planting with Scots pine (Pinus sylvestris), in combination with various drainage intensities (20, 30, and 40 m between ditches), and fertilizer doses 0, 100, and 200 g PK per seedling applied at the date of planting. The aim of this study was to achieve more knowledge about the conditions on afforestation of peat harvesting areas, especially regarding drainage intensity and fertilization requirements, by means of determining the stand growth and yield in the Flakmossen trial. The forest growth did not differ significantly between the drainage intensities tested when the same amount of phosphor and potassium fertilizer was added. Thus, shorter distances between ditches than 40 m can not be recommended. When no fertilization was carried out seedling survival was very low, and the growth of sur-vived seedlings was poor. The largest diameter and height growth were observed in the areas where the highest dose of phosphorus and potassium (200g/seedling) was given.

The requirements for operative planning activities are increasing. The forest industry wants to gain better control over wood flow. A felling that is more market adjusted is desirable. However, this causes problems in the operative planning process because of the data collection methods used today. Data about timber assortments and data about the distribution of the tree diameter, etc., are often lacking. Airborne laser scanning is used to a greater extent than before for estimation of forest variables and should perhaps be used to the same extent in operative planning activities as well.

In 1994 a new Forestry Act was accepted in Sweden. One of the aims of the law is to raise consideration forpreservation of biodiversity. Since the new law got accepted and some time has passed, there now lie someinterest in examining whether the law has been effective towards its purpose. Methods suitable for analysishave been examined during this study. The content of this pilot study is based around five parameters whichcan be used to validate the effects of the new law.

The landscape can be something that you rest your eyes on, something that goes quickly past outside the windscreen or the place for the daily work. To me, landscape is everything around us ? the city, the field and the forest. But what is landscape for you? What does the idea of the landscape stand for? How does our view of the landscape become influenced of the place where we grow up? And the differences between peoples different views of the landscape ? what does they depend on? My point of the view for this paper is that the landscape ideals mostly depend on the landscape where you grow up and that it depends less on the differences between the individuals. As a landscape architect the idea of the landscape is the essential. The more we learn, the more we realize how complex it is, but deep down we always have our own experiences and memories and that shapes our personalities.

With the elevated oil prices of today it is necessary to look for other heating alternatives. If the oil price continues to develop in the same way it has done the last years it will soon be impossible for many producing garden companies to survive. The purpose of this diploma work is to compare three different fuel options in order to find the most economic one considering the conditions of Katrinebergs Handelsträdgård AB. In relation to oil it is profitable to change to any of the three alternatives: wood chips, wood pellets and grain. The most profitable option is to change to wood chips. This alternative has a payoff time less than three years and after that the annual saving compared to the oil is relatively high. The annual cost is 65 % of the cost of the oil alternative.

Svartedalens nature reserve a social richness worth develop. The nature reserve of Svartedalen is an area of high biological and social values. The reserve is located close to several densely populated areas. The reserve has been classified as a national area of interest for nature conservation and outdoor life, and as a Natura 2000 area according to both the bird- and habitat directions. The reserve is the largest landarea in Västra Götaland, 3 410 hectares, where a resolution has been made about all these forms of protection. The foundation Skogssällskapet owns 1 956 hectares of the reserve, at 1 384 hectares of the property they pursue FSC-certified silver culture, according to current management plan.

To be able to plan for the expansion of a town, one needs a vision of the future appear-ance of the town. It is the current issues (social situation, supply and demand, political control etc.) which decide what the ideal for town planning is. This is turn is the steering factor of the physical structure of the town. Therefore, the town's structure is decided by these ideals.In this report, I will present planning ideals that have historically been, and which criticisms that have been directed towards them. With reference to these issues, I will present those guidelines and ideals we have today for planning of our towns.

Saproxylic lichens in managed forests have less substrate available than in unmanaged forests due to the shortage of dead wood. However, a suitable substrate for these lichens could be dead branches on living trees. To this date, there has not been any systematically collected data about theabundance of dead branches on living trees and the lichens growing on these branches in managed forests. The aim of this study was to see where dead branches were located on living trees of Pinus sylvestris and Picea abies, how large the surface area of these branches was and what lichens grewof wood on these branches. The study was made in Finspång, Sweden, where 11 forest stands of P.sylvestris and P.