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455 Uppsatser om Basiphilous pine forests - Sida 30 av 31
Vedrötor i stadsträd : biologi, detektionsmetoder och förebyggande åtgärder
Urban trees have very little in common with trees on natural sites, such as forests or pastures. Trees in urban environments are often planted in packed soil and in small volumes. This can lead to decreased availability of water and oxygen, as well as deteriorated ability for the soil to store nutritional elements. Also above ground the tree usually have limited space in cities. Regulations on free height over roads and cycle tracks demands high stems at an early stage of their development.
Hur kan mångfalden gynnas på SCA:s naturvårdsareal? : natur- och kulturvärden i Peltovaara mångfaldspark
Områden med skyddad skog i norra Fennoskandia, som tidigare beskrivits som orörd urskog, har på senare tid visat sig vara påverkade av långvarigt mänskligt resursutnyttjande. Historiska analyser av ekosystem, där även antropogena störningar beaktas, har därför börjat lyftas fram som en viktig del i naturvårdsarbete (Foster m.fl. 2003). De hjälper oss att förstå hur strukturer och störningsdynamik har förändrats över tiden, vilket kan vara till stor hjälp vid skötselplanering och restaurering.
Det övergripande syftet med den här studien var att kvantifiera kulturspår och analysera förekomsterna av kulturvärden i relation till framförallt naturvärden, men även sociala värden, i ett skyddsvärt borealt barrskogsområde. Min avsikt var att försöka exemplifiera hur skogshistoria kan användas för att skapa underlag för skötselplanering i områden med naturvårdsanpassad skogsskötsel.
Föryngringsresultat och beräknad virkesproduktion i naturligt föryngrade tallbestånd i Västerbotten under mitten av 1990-talet :
According to the Board of Forestry, in Västerbotten, many natural regenerations of Scots pine (Pinus sylvestris) carried out on privately owned forest in the middle of 1990 in Västerbotten have rendered a bad regeneration outcome and will provide a low future forest production. The Board of Forestry believes that the negative result can be explained by the fact that the regeneration has been carried out in wrong locations and that scarification failed to work as planned. In order for an accepted rate of regeneration the guidelines of the Forrest Act require, not less than 10 years after final cutting at natural regeneration, that there should be at least 1300 (site indices 16 m) - 1700 (site indices 20 m) main crop stems per hectare. Main crop stems are defined as stems according to the place of growth and appropriate tree type, in addition with regard to quality, stage of development and damage risk have a prospect of succeeding. In addition main crop stems should be separated by surface so that the proportion sample plots with 3 meters radius, and lack main crop stems, are not more than 10 % of site indices 14 meters or higher.
Klövviltets nyttjande av foderraps på viltåker och betespåverkan på angränsande skog
Today we have more game species than ever before in our landscape, both regarding number of species and number of individuals. The increasing number of wild species is an increase in game recourse for the countryside. The increase of game species, however, has negative effects on forests and agriculture land. The negative effects for forestry are damages on economic important trees, due to losses in production and quality. However there are ways to decrease the damage on valuable and important trees.
Välkommen : vackrare infart till Vilhelmina
The purpose of this thesis is to show how a good approach can be designed, focusing on the southern approach to the Swedish town Vilhelmina. Prior to the car being part of everyday life, the approach was a road where the town showed itself from the very best side. When the amount of traffic increased, so did noise and other disturbances, and as a consequence industrial areas replaced the residential buildnings at the approaches. Today, the pendulum is turning back and in recent years the approach is regarded as a place to introduce the town. The approach is also the place where cars should slow down from the speed of the main road to the speed of the city.
Förändringar i skogsbranschens organisation på 1990-talet : antalet tjänster, kompetens och utbildningsinsatser
In 1993 Sweden introduced a new Forest policy, with a larger freedom of action for the forest owners, but in the same time the forest owners are expected to take greater consideration of the forests and the environment, that is required by the law. This is necessary to be able to obtain the goals of the new policy. Therefore the demand for competence and guidance is larger than before. At the same period of time organisations where slimmed and trimmed during a economic recession and the question is how this has affected the number of employees on different levels in the organisations, the competence of the employees and their internal education and if these changes affects the possibility of implementing the forest policy.
This study contains three points in time where measures were made, 1990, 1995 and 2000.
Vad påverkar skogsägarnas naturhänsyn vid föryngringsavverkning i region Mellannorrland? :
The objective of this thesis was to investigate what influence nature conservation measures taken at regeneration felling. Factors analysed were the forest owners´ situation and their characters, and information activities from wood-suppliers and the Regional Forest Board (RFB). The inventory was performed with a posted questionnaire followed up by telephone to forest owners and a posted questionnaire to wood-buyers.
The forest owners were grouped in three strata, depending on the quality results (D- polytax inventory) of the taken forest conservation measures, and for this investigation forest owners were sampled from the population in the tree groups. In total 73 % (41/56) of the sampled forest owners answered the questionnaire
Group A (17 answers): Good judgement
Group B (19 answers): Bad judgement
Group C (5 answers): This group was formed from the forest owners that were informed, by RFB, about nature conservation measures and culture history consideration before the regeneration cutting.
Urban Agriculture i den hållbara staden : en fältstudie i Managua
The way we design our cities today will affect the living conditions for future generations. Planning as a discipline can become crucial to attain a sustainable urban development with an increased quality of life among the urban population and an improved environment.
Urban Agriculture in the Sustainable City -a case study in Managua is a Diploma Work that deal with poverty issues, aspects of sustainability and development work. We have had a theoretical starting-point, but our focus has been on the case study i.e. the practical part, that we carried out in Managua, the capital of Nicaragua.
Today about half of the worlds 6,3 billion people live in cities. The demographic growth of the countryside has declined, while the population in the cities is considerably increasing.
Tillväxt för skogssådd och plantering fram till röjning och första gallring : föryngringsmetodernas potential att uppfylla olika produktionsmål
Holmen Skog nyttjar i stor utsträckning både sådd och plantering, varje år används sådd på omkring 20 % av föryngringsarealen. Företaget önskar sig dock mer kunskap om hur tillväxten skiljer sig åt över tiden mellan skogssådd och plantering. Syftet med studien var därför att jämföra tillväxt för skogssådd och plantering inför röjning och inför första gallring samt att undersöka hur väl olika produktionsmål kan uppfyllas genom valet av stamtäthet vid anläggnings- eller röjningstillfället. Studien genomfördes på Holmens Skogs egen mark, distrikt Umeå och Norsjö i Västerbottens län. Sådda bestånd parades med planteringar.
Rydboholms engelska park : historik och vårdprogram
The estate of Rydboholm is situated in the municipality of Österåker, north of Stockholm, Sweden, and has a long history dating back to the 14th century. Rydboholm was the home of several families of great national importance, such as the Finsta and Vasa clans. However, since the 1500s, the noble family Brahe was the most influential; leaving its mark on the castle and surroundings. The gardens of Rydboholm consist of two parts; The first is from the baroque era, dating back to the 1660s, and the second is an immense landscape park completed around the year 1800 by Magnus Fredrik Brahe.
During his travels through Europe, Magnus Fredrik Brahe was influenced by the new English-style gardens and he brought a large collection of literature on the subject back to Sweden, still kept in the library of Rydboholm.
Sortimentsinriktad avverkning
Forest enterprises have always searched for ways to improve efficiency. For the past few
years there has been an emphasis on stock-keeping levels. Increased demand for fresh
round timber and the need to decrease the amount of tied-up capital has made the forest
industry reduce its inventory levels. This has brought on a higher demand on the timber
supply from the forest management districts concerning both delivery in time and
assortment output. As a result, the flow of timber has fluctuated a lot with serious
consequence for the timber supply during 1994.
Förvaltning av offentliga skogsfastigheter : strategier och handlingsplaner
I Sverige finns det 290 kommuner varav majoriteten äger skogsfastigheter. 60 procent av den urbana skogen ägs av kommuner, vilket betyder att strategin för förvaltning av de offentliga skogsfastigheterna får betydelse för säkerställande av bland annat frilufts- och rekreationsområden men även som markreserv för framtida exploatering. Enligt kommunallagen är det upp till varje kommun att formulera strategier för hur förvaltningsarbetet ska utformas och genomföras. Eftersom kommunernas uppgift är bred med ett konglomerat av uppdrag och tjänster konkurrerar ofta olika krafter inom organisationerna med varandra, vilket kan orsaka implementeringsproblem. För en del kommuner kan det innebära att förvaltningen av offentliga skogsfastigheter åsidosätts.
Plantetablering och tillväxt för sådd och planterad tall 2-5 år efter markberedning med harv eller Huminmix-teknik inom Holmen Skog distrikt Norsjö :
The objective of this work was to compare the environmentally gentle soil scarification technique Huminmix (with possibilities to do track-grinding/HMMspår, long-scraping/HMMlångfläck and mounding/HMMhög) with conventional disc trencher, concerning seedling establishment and growth of direct seeded and planted Scots pine seedlings. Inventories were made during June and July 2005, in 34 seeded and 6 planted stands from 2000 ? 2004 (1- 5 years old) of lichen- and myrtillus/vaccinum-type in Holmen Skog AB´s district Norsjö in Västerbotten. The Huminmix-technique had been used for HMMspår in the seeded stands and for HMMhög in the planted stands (HMMlångfläck has been used from the year 2006 for direct seeding). The studied stands had been seeded with the same amount of seeds according to stand data.
Den skogliga informationens roll i ett kundanpassat virkesflöde : en bakgrundsstudie samt simulering av inventeringsmetoders inverkan på noggrannhet i leveransprognoser till sågverk
This MSc thesis is divided into two parts. The first part deals with the need for information
from forest campartments selected for clear cutting, in connection with planning in an
integrated forest- and sawmill enterprise. A review of literature is followed by a case stud y,
where present conditions in a Swedish forest company are compared with current research in
the area. The seeond part consists of a simulation stud y, which aims at camparing the
accuracy of inventory estimates using different methods. The estimates are delivery forecasts,
covering one month consumptian of timber in a large sawmill.
Vad tycker bilister om vägnära skogar : två enkätstudier
Denna studie har genomförts genom en litteraturstudie och två enkätundersökningar. Syftet
med litteraturstudien är att sammanställa relevant information om ämnet. Syftet med enkät
undersökningarna har varit att utforma en enkät och få svar på vilken landskapstyp och skogs
typ som uppskattas mest av bilister.
I litteraturstudien har information samlats om landskapet och dess uppbyggnad. Den första
enkätundersökningen genomfördes i kön till Bilprovningen där utvalda personer intervjuades.