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340 Uppsatser om Norway spruce (Picea abeis) - Sida 22 av 23

Bosättning, agrarkris och fäbodväsende : vegetations- och markanvändningshistoria i Läde, Dalarna

By using pollen analysis, 14C-dating and historical sources, I studied the history of vegetation and land use at an abandoned forest settlement near the Lade summer farms in the parish of Mora, Dalama. The aim of this paper is to investigate the agricultural establishment and development, the effects of this on forest vegetation, and the origin and development of summer farming. The analysis of pollen in a peat core revealed that a settlement was established at Lade around 1000 AD. Cereal cultivation, hay-making on the mire and extensive forest grazing were intro-duced as a complete agricultural system. Pollen analysis and the presence of ancient fields suggests that cultivation took place on permanent fields. Barley was the main crop, but rye and hops/hemp were also grown at the settlement.

Naturligt föryngrade huvudstammar i röjda bestånd etablerade efter plantering på SCAs mark

Dagens dominerande föryngringsmetod i Sverige är plantering som utgör 75 procent, därefter kommer naturlig föryngring som utgör 18 procent. Anledningen till att plantering är den dominerande föryngringsmetoden är att ofta används förädlat material vid tillverkning av plantor vilket ökar tillväxten och överlevnaden samt minskar omloppstiden. Föryngringsperioden är kortare hos plantering jämfört med naturlig föryngring. Röjning är en beståndsvårdande utglesning som ska gynna stammar med bra egenskaper. Faktorer som kan påverkas med röjning är trädslagsblandning, tillväxt och kvalitet.

När en norsk del av Danmark tillfogades Sverige : en ingång till att förstå bohuslänska identitetsföreställningar 1662-1668

This essay discusses the Nordic region Bohuslän the decade after it became "Swedish" in 1658, during what I call the region's "transition period". The wide cause of the study is to show how the traditional understanding of this state shift (and of state shifts in general) need to be problemized and understood in the light of the state conditions of Early Modern Europe. By examine court protocols from the local-court of Orust and Tjörn (one of five local courts in contemporary Bohuslän) and the local noble's writings to the Swedish parliament, a tricky mixture of references to different territories gets observed and analyzed.To approach the difficult identity problems, I have assistance in Peter Sahlins' conclusions from his study of the French-Spanish borderland during the same period. Especially helpful are his identity schemes by which he (inspired by the Norwegian anthropologist Fredrik Barth) supposes that each identity originates from a counter-identity. This study ends up in an attempt to reconstruct the landscape of identities and counter-identities found in the sources, according to professor Sahlins' schemes.

Tillväxt hos Husmossa (Hylocomium splendens) i boreal skog och växthus : effekter av ökad vattentillgång

Hylocomium splendens (Glittering wood-moss) is a common species in the Nordic countries and can be found in many different types of boreal forests. It usually forms dense moss carpets on the forest floor. The shoots grow in segments and new segments form annually on the previous years growth. The size of the segments is probably regulated in a high extent by local micro environmental conditions. Previous experiments suggest increased growth of H.

Rätt gåva för rätt tillfälle

This master thesis is a study of the Swedish hydropower capacity to balance wind power. The Swedish government has decided that it should be possible to produce 30 TWh from wind power in the year 2020. The Swedish municipalities have to have plans for wind power plants with total yearly generation of 30 TWh. Wind power is an variable energy source that needs to be balanced by other energy sources. In Sweden the Swedish hydropower can be used for balancing a large scale introduction of wind power.

Kan biologisk mångfald ökas i ett avsatt skogsområde? : skötselplan för Storskogsberget på Holmen skogs marker, distrikt Umeå

The biodiversity of the Swedish forest has degenerated since the beginning of the 19th century when fire suppression and large scale logging first occurred. Together with a changed land use, these actions today have had a negative influence on many forest dwelling species, due to gradual reduction of natural processes, successions and different structures from the forest ecosystem. The Swedish Forest Act, together with different environment certifications, have today encouraged private persons and forest companies, among them Holmen Skog, to work actively to improve nature conservation. The aim of this study was to, by field inventories of already existing nature values, literature studies, recommendations from scientific reports and ecological gap analysis as a basis, make a management plan, for a non-production area, to conserve or improve the prerequisites for biodiversity. ?Storskogsberget? is located in the coastal area of Västerbotten County, 35 km from the city of Umeå.

Balansering av en storskalig vindkraftsutbyggnad i Sverige med hjälp av den svenska vattenkraften

This master thesis is a study of the Swedish hydropower capacity to balance wind power. The Swedish government has decided that it should be possible to produce 30 TWh from wind power in the year 2020. The Swedish municipalities have to have plans for wind power plants with total yearly generation of 30 TWh. Wind power is an variable energy source that needs to be balanced by other energy sources. In Sweden the Swedish hydropower can be used for balancing a large scale introduction of wind power.

Malmmineralogisk undersökning av Pb-, Zn-, Cu- och Ag-förande kvartsgångar i Värmskogsområdet, mellersta Värmland

AbstractPolymetallic (Pb-Zn-Cu-Ag-Au-Sb-As-Bi-Cd-Te-Se-Ge?) quartz veins occur in an area from Eidsvoll in southeastern Norway to west of LakeVänern in southwestern Sweden. They most likely formed during the waning stage of the c. 1 Ga Sveconorwegian orogeny. In Värmskog parish, Värmland county, several mineralized quartz veins of different types are known.

Vattensänkningar : en analys av orsaker och effekter

There are records of lowering of the water level in a lot of the Swedish lakes from the middleof the 1700th century. The aim was gaining more areable land to meet the needs of more foodto support the expanding population. In areas with top soil which contents of clay or loam asin the southwest of Scania in southern Sweden this was proven to be a successful wayexpanding the total outcome of the harvest.The studied area in the northeast of Scania, though, consists of morain with a lot of mires -much less nutritious conditions. When the water level is lowered the atmosphere gets accessto the peat. The dissolving of the organic matter that has been suppressed by the lack ofoxygene below water level continues.

Datorbaserad bedömning i språk forskningsläge, erfarenheter och implikationer

To support uniform and fair assessment of Swedish students? English language competences, mandatory National tests are provided both for secondary and upper secondary education. The current thesis may be seen as a contribution to the further development and validation of these tests, with regard to the likely introduction of computerized testing methods. The aim is to gain further knowledge from current research in the field, to study and elucidate international experiences of implementation, and to gather and analyze feedback from students and teachers. Based on my findings, some tentative conclusions will be drawn, and recommendations made concerning future developments.

Vart är naturen i skärgården på väg? : skogshistoria på Ängsön-Marskär i Stockholms södra skärgård

The following thesis is a study of the forest history on the island of Ängsön-Marskär concentrating on the last three hundred years. The island is located in the administrative province of Stockholm, the local community of Haninge and it is situated approximately seven kilometres east of the island Ornö in the south of the Stockholm archipelago. The questions this thesis attempts to answer are: How where the natural resources on Ängsön-Marskär used through the centuries? How has the state of the forests developed since the 16th century? How will the nature develop onwards? The thesis is based on archival sources for Ängsön-Marskär and the surrounding areas. A field study was conducted where the entire island was investigated using an objective forest inventory method. The first map material existing over Ängsön-Marskär is from the year 1711.

Svensk livsmedelsexport : hur upplever svenska livsmedelföretag exportmarknaden?

The food industry is an important part of the Swedish economy, It is the fourth largest industry in Sweden in terms of number of employees and production value. Due to the increasing globalization, the Swedish food industry faces new conditions and challenges. Through the Swedish membership in the European Union in 1995 a whole new era of competition began for the Swedish agriculture and food industry. Markets that previously were closed now opened. In retrospect, it should be noted that the Swedish food industry managed well.

Naturlig föryngring av skog

Populärvetenskaplig sammanfattning: Målsättningen med detta projekt var att undersöka vilka trädslag som dominerar vid naturlig föryngring samt vilka faktorer som påverkar föryngringsresultatet. Bakgrunden till projektet är en önskan från Skogstyrelsen i Höör att få en bättre uppfattning om hur situationen ser ut i skogarna då allt fler skogsägare väljer naturlig föryngring på sina marker. Syftet med undersökningen är att skogsvårdsstyrelsen med stöd från våra resultat, ska kunna ge ett bättre stöd och råd till markägare som överväger naturlig föryngring. Projektet ska även kunna ge stöd vid uppföljning och tillrättarvisning av markägare som ej fullgjort sina lagstadgade åtaganden, att något måste göras om de misslyckats med föryngringen.Studien genomfördes i Höör och Hörby kommun i centrala Skåne. Kommunerna ligger på gränsen mellan gran och lövbältet varför de lämpar sig väl för studien.

Prevalence of congenital defects in Swedish Hampshire, Landrace and Yorkshire pig breeds and opinions on their prevalence in Swedish commercial herds

This study concerns congenital defects in pigs; umbilical and scrotal hernia, cryptorchidism, kyphosis, splay legs, anal atresia, intersexuality and congenital tremor. The aim was to describe and estimate the prevalence of these defects and estimate the heritability for the most frequent defects, scrotal hernia and cryptorchidism in purebred Swedish Hampshire, Landrace and Yorkshire populations. Furthermore, information and opinions from herdsmen in commercial herds was collected and analysed. A low proportion of congenital defect pigs is of importance both from animal welfare and economic point of view. The accuracy of registration of the presence of defects in the litters has a decisive role for the ability to select against these defects.

Brunnsröjning med kedjeröjsåg - effekter på kvarvarande bestånd

Vintrarna 2005 och 2007 drabbades södra Sverige av stormarna Gudrun och Per. Konsekven¬serna blev förödande framförallt för skogsbruket. Redan före stormarna fanns det mycket stora arealer ungskog i behov av röjning i Sverige. En av anledningarna till att svenska skogs¬ägare hamnat efter med röjningen var att röjningsplikten i skogsvårdslagen avskaffades år 1994. Sex år efter Gudrunstormen är tiden snart inne för förstaröjning av många av de gamla stormhyggena.

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