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838 Uppsatser om Mixed stands - Sida 3 av 56
Körskador i gallring : en studie av 21 drabbade objekt i södra Sverige
To guarantee the customers a job satisfactory executed Sydved has been certified by the ISO 14001 standard. One part of the certification is the standards of soil damages. The soil damages were over represented during 1999 and 2000. It was therefore a need to study the problem in order to see what could be done to reduces these damages.
A filed study was carried out on 21 subjectively selected stands from the following five districts: Vänersborg, Falköping, Borås, Jönköping and Åseda. As the study is a descriptive study of the soil damages, their character and extension, only stands were tracks were reported were considered.
Unga kvinnors upplevelser av abort
Background: How a young woman approaches an abortion and how she handles its emotional impact is influenced by many factors. Mixed emotions about terminating a pregnancy are common to women of all backgrounds and circumstances. Aim: To illuminate young women´s experiences of abortions. Method: The study wasbased on literature from online databases and printed materials and involved the analysis of ten articles and one thesis. Result: Women contemplating abortion experience mixed emotions before, during, and after an abortion.
Naturlig föryngring av lövskogar i Örebro län :
The Regional Forestry Board in Värmland- Örebro needs increased knowledge on silviculture in broad- leaved forests. This thesis is an inventory of naturally regenerated broad leaved forests, and the results from the inventory have been compared with The Regional Forestry Board?s demands on regeneration results. The result of this inventory was that the regenerated sites were suitable for broad leaved trees, but only half the number of the stands fulfilled the demands of regeneration results of The Regional Forestry Board, mainly because of gaps in the stands. The gaps in the stands were mainly caused by lack of soil preparation and seed trees..
Accounting Mismatch: Teoretisk definition med en tillämpning på svenska bankers redovisning
Accounting for financial instruments can either be based on a transactions approach or an eco-nomic approach. Under a transactions approach instruments are reported at cost whereas under an economic approach instruments are reported at fair value. Hence, under a transactions approach realization becomes a criterion for recognizing fair value fluctuations as revenue whereas under an economic approach it does not. A mixed model is defined as a combination of the transactions approach and the economic approach insofar it records some accounting items at cost and other items at fair value. The mixed model gives rise to an issue commonly referred to as an accounting mismatch.
Röjningsformen och stamantalets effekt på höjd- och diametertillväxt i toppröjda och konventionellt röjda tallbestånd.
Topping is a precommercial thinning (PCT) method where secondary stems are cut higher above the ground compared to conventional PCT. The secondary stems continue to live for a period and are supposed to compete with the main stems and promote their quality.The objective of the study was to compare the effect of PCT on height and diameter growth between topping and conventional PCT. The study also analysed the relationship between height and diameter growth and the number of stems after PCT.Nine topped stands and six conventional precommercially thinned stands were visited between February 28th and March 5. One sample plot per hectare was laid out in the investigated stands. In every sample plot the number of stems was counted and five main stems were measured for height, height growth since PCT, diameter and diameter growth since PCT.The results showed significantly higher effect on height growth after topping as compared to conventional PCT but no significant difference in the effect of diameter growth between topping and conventional PCT.
Productivity of Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) in coastal areas of northern Sweden
Productivity of Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) was
studied on 12 sites in coastal areas of northern Sweden. On each site, sample
plots were placed in adjacent Norway spruce and Scots pine stands with similar
ages in between. Basal area, tree height, Site Index, volume production,
simulated maximum mean annual increment (MAImax) and tree vitality were
compared for the two species. Average basal area at the time of measurement
was 30.4% larger for Scots pine stands than for Norway spruce stands. The
difference between the two species in basal area increment during the last 10
years was related to stand age.
Identifiering av konfliktbestånd med hjälp av laserskanning
The interest in harvesting wood fuel in conflict stands has grown in recent years as a consequence of the increased demand for biofuel. Conflict stands are young forests that have not been cleaned and have a large number of stems ha-1with a great height and diameter distribution. This means that traditional field measurements in conflict stands are difficult and very time consuming. Therefore, the forestry sector is in need of new, more efficient inventory methods. In this study, the Lidar data from Lantmäteriet?s (the Swedish mapping, cadastral and land registration authorities) new national height model was used in combination with plots from the Swedish national forest inventory from 2009 to create functions for; height, volume, diameter and number of stems.
Skriftspråksskillnader? : En jämförande studie av flickor och pojkars skriftspråk på gymnasienivå
Our society has faced monumental changes and therefore our working life has changed as well. We are now in the twentieth first century and still our labor market is gender-segregated. Today networking is an important part of working life and one cannot emphasize enough the importance of having good connections in your network. Networking is now seen as an important tool when it comes to your career. In the past networking has been the men?s arena and it has almost been seen as a male institution.
Identifiering av röjningsbestånd med hjälp av flygburen laserskanning
Bergvik Skog is one of the leading forest companies in Sweden who use airborne laser scanning for forestry information. They utilize laser data retrieved by the Swedish National Land Survey to describe the forest holdings and facilitate planning for thinning and final felling operations. However, the possibility to identify stands with clearing needs by using laser scanning data has not been tested in a large scale. The data used in the current study are field data from The Swedish National Forest Inventory in combination with laser data from the Swedish National Land Survey acquired in 2009. The collected data is used to find one or several laser variables that best describe the relationship of the field measured samples with clearing needs.
Lövsuccessioner i sluttningar längs nedre Umeälven :
Secondary deciduous forests, which have their origin in earlier pasture- and meadow-land in slopes along the lower reaches of the Ume river, are thought to contain high nature conservation values, in spite of a relatively low age. The aim of this study was to clarify how factors as historical use, exposition, disturbance dynamics and successional age influences the conservation values in these types of riparian forests and how this can be implicated in the practical work with conservation and management at Umeå municipality. Sample plots were placed in seven stands with a variation of their historical use, exposition, disturbance dynamics and age of succession. Conservation values as structure, tree-regeneration, abundance and composition of vascular plants, amount of dead wood and the abundance of signal-species were measured and registered. The species composition and especially the composition of tree species, differed between forests with different exposition and different historical use.
Sit, Eat, Drink, Talk, Laugh ? Dining and Mixed Media
Sit, Eat, Drink, Talk, Laugh ? Dining and Mixed Media, is an exploratory study of qualities in everyday life and challenges people to enjoy the qualities of mundanity. Seeking inspiration in ethnographic studies, field work was conducted in domestic settings, returning an extensive body of material to work from. The study challenges people to absorb the moment, reflect and enjoy, rather than pacing through a lifetime, with a constant focus on the future instead of the present. This work takes a starting point in food and dining as a social activity, where interactive sound and a reference to online social media is explored through two interventions.
Vilka faktorer avgör då skogsägaren söker samarbetspartner för planering och genomförande av skogsvård?
Silviculture in young stands in Sweden is below the mark concerning what has to be done in the forest, and it is time to solve the problem. The problem will not be solved only by the private forest owners, professional help is needed.
Skogsägarna Mellanskog is one of four forest unions in Sweden who wants to play a role and take responsibility for forestry in the middle of Sweden. This academic essay is based on a market survey sent to 350 forest owners in the Örebro district. 186 of them answered the questions, giving a response frequence of 53 percentage.
The purpose of the essay is to find the determining factors which will make a forest owner to find a collaborator when planning and carrying out the silviculture measures in young stands.
The result of the survey shows that the forest owners are anxious about the price and the costs. The costs have a severe effect if the silviculture measures in young stands will be carried out or not.
Växelbruk på Hornsbruksgatan
Längs den skuggiga Hornsbruksgatan bryter en veckad volym upp den långa sträckan. En ny bergssida som definierar park och gata och serverar scener för medborgarinflytande på både gräs och betong. Med biblioteket som katalysator får den bortglömda delen av Hornstull ett välbehövligt komplement av både mångfacetterad verksamhetslokaler, kontor och större lägenheter. Med mer park i parken och mer stad längs gatan bygger Hornsbruksgatan vidare på områdets karaktär av experimentalitet ? ett urbant växelbruk..
Stamskador i gallringsbestånd
This study was conducted on a property with a thinning machine team. The purpose was to investigate in which machine, the harvester or the forwarder, that caused most damage to the trees in six different stands. Different factors, related to the damage frequency in the stands, were checked out. For example: basal area per hectare, thinning strength, tree diameter and the rate of production.
The harvester drivers were also interviewed about how, when and why stem damages occur and how to minimize them.
The study stated that 4.3 percent of the trees were damaged. Out of these 88 percent was caused by the harvester and the rest, 12 percent, by the forwarder..
Inverkan av nederbörd, temperatur och frost på årsringens egenskaper hos boreal tall (Pinus sylvestris L.) :
The wide distribution range of our boreal pine (Pinus sylvestris L.) provides a great variation in growing conditions and climate/weather factors that influence the wood development of the trees. A great number of extensive studies have been conducted over the years in order to clarify growth trends of this and other species over more or less wide-ranging areas.
In this thesis effects of weather factors were instead compared between different forest stands from the about same geographical location. The effects of precipitation, temperature and frost on the year ring characteristics of pine were studied in the research forest of Svartberget Vindeln, in northern Sweden. The stands differed in site index and silvicultural treatment; fertile ? high stem density, fertile ? low stem density, poor ? high stem density and poor ? low stem density.