To regularly remove woody vegetation along the roadside of forest roads is an important part of the road maintenance, since the vegetation binds moisture in the road side and, thus, the removal makes the road drying faster with results in improved bearing capacity. Vegetation removal also makes it easier to upgrade the road by material recycling from the ditch and, moreover, the visibility along the road is maintained.The aim of the study was to evaluate what type of chain flail is the best and most cost-effective for removal of different kind of woody vegetation along forest roadsides.Time studies were made on two chain flails when removing woody vegetation in three different classes; easy-, middle- and heavy shrub removal. The studied flails were one light and rather simple flail named Optimal M160 and a heavier and more advanced flail named Slagkraft H210. The removal was made according to Holmen Skogs? specification and the quality of the cleaning was measured by objective belt inventory.The productivity was higher with the heavy flail within all cleaning classes.

Korruptionen i Kina beror på flera olika faktorer där de huvudsakliga är ekonomiska, kulturella och kontrollmässiga. Det finns klara korrelationer mellan att Kina är ett relativt fattigt land och det faktum att där finns en utbredd korruption, något som däremot inte är exklusivt för Kina. Något som dock är mer unikt för Kina, och som vi också funnit påverkar korruptionen, är det kulturella fenomenet guanxi som verkar i gränslandet mellan det lagliga och det vi anser korrupt. Den utbredda korruptionen i landet urholkar också det juridiska IP-skyddet och leder till att skyddet måste övervägs på fler plan än bara det rent juridiska. För att förebygga och motverka pågående intrång av IP är goda kontakter med statliga myndigheter både på central och på lokal nivå mycket viktiga.

Korruptionen i Kina beror på flera olika faktorer där de huvudsakliga är ekonomiska, kulturella och kontrollmässiga. Det finns klara korrelationer mellan att Kina är ett relativt fattigt land och det faktum att där finns en utbredd korruption, något som däremot inte är exklusivt för Kina. Något som dock är mer unikt för Kina, och som vi också funnit påverkar korruptionen, är det kulturella fenomenet guanxi som verkar i gränslandet mellan det lagliga och det vi anser korrupt. Den utbredda korruptionen i landet urholkar också det juridiska IP-skyddet och leder till att skyddet måste övervägs på fler plan än bara det rent juridiska. För att förebygga och motverka pågående intrång av IP är goda kontakter med statliga myndigheter både på central och på lokal nivå mycket viktiga.

Headwater streams are affected by anthropogenic impacts at multiple scales. One aspect of human impact is sediment transport associated to the abundance of stream structures as large woody debris and the composition of the riparian zone from forest to agricultural landscapes. Riparian buffer zones and stream structures like dead wood are considered as generally important structures for protection against an increasing amount of sediment particles in the water. Hence, in this study these structures were quantified in thirty different stream segments on land and in the water. To measure the transport of sediment Whitlock-Vibert boxes were used in three different types of landscapes; forest, transition and fields. The boxes were left in the stream segments for three months, the taken up and dried and weighed. The results showed that the transition-land in Frösvidalsån had the highest sediment transport. The second highest transport of sediment was in Blackstaån at the fields.

The task given to us was to develop an industrial wheel with new thinking in terms of fresh design and construction, with the ability to brake. While the produced wheels of today only own the property of total braking, a wish was made to integrate the ability of directional locking.The time spent working with the project has been filled with multiple sketches of ideas and function analysis.Choices of material and ways of construction have been verified by calculations, tests and prototype building. The goal of this thesis has been to develop a unique caster with well thought-out design that would be adaptable to different areas of applications.The result was a hubless wheel with the ability of directional locking before total braking.A prototype of the wheel has been made to show the design and functions..

Skogen är den viktigaste exportvaran för Svensk ekonomi. I de norra delarna av Sverige har många sågverk tvingats att lägga ned sin verksamhet det senaste decenniet. Vi har undersökt de tre kvarvarande sågverken i Arvidsjaursområdet, för att se vilka faktorer som har gjort att de överlevt. Vi har använt oss av Property-Rights-teorin vars ena grundtes framhåller att ?om inte jag utnyttjar resursen kommer någon annan att göra det utan hänsyn till mig?.

During whole-tree harvesting, there is a risk that the soil will become impoverished of nutrients. To prevent this, nutrients are returned to the harvested site as wood ash. This action also reduces the risk of soil acidification. Nevertheless, the ash does not result in any increase of tree growth if it is added on mineral soils, which is where the measure is most commonly used in Sweden. Due to the lack of growth response, the interest from landowners is small, which is why ash amendment today is not done enough to compensate for the need.

Construction and maintenance of forest truck roads are a necessary element of industrial forestry. Payment for contracting services in this context can be done according to a number of payment models. This study will focus on the methods and consequences associated with a change of Holmen Skog?s payment model from per hour to per metric ton for ballast hauling. The aim of this study is to improve the economic efficiency of Holmen Skog?s ballast hauling in construction and maintenance of forest truck roads. This is done by formulating and evaluating a proposal for a payment model based on crowns per ton.

Plant survival, plant damage and height growth were studied in nine wild cherry (Prunus avium L.) plantations in southern Sweden established between 2000 and 2002. All stands were located to the county of Småland. The survey was conducted during May and June in 2007. During the survey the height, diameter and quality of the cherry trees were recorded. In one stand, red ? berried Elder (Sambucus racemosa L.) was a dominant species.

The introduced lodgepole pine (Pinus contorta) occupies more than 650 000 hectares in Sweden. There are some differences between lodgepole pine and Scots pine (Pinus sylvestris) forests which could affect bird assemblages, for example differences in canopy density and ground vegetation. Birds were surveyed in 14 localities in northern Sweden, each characterized by one middle-aged stand of lodgepole pine next to a stand of Scots pine. The two paired stands in each locality were planted by the forestry company SCA at the same time and in similar environment to evaluate the potential of lodgepole pine in Sweden. In those 14 localities, one to three point count stations were established in both the lodgepole pine and the Scots pine stand, depending on the size of the area.

This thesis is about the effects of fertilizing and thinning on furniture timber from redwood. Interviews of furniture manufactures have been made and observing of timber from the Swedish fertilizing and thinning trails. The result from the interviews showed which properties that is important for the furniture manufactures and then the result from the observation showed which type of management of the forest that gave the most timber that had those properties. .

This thesis analyses the prerequisites, profitability and competitiveness of eucalyptus plantation on the Iberian Peninsula and in Brazil. The thesis has a macro perspective and analyses a typical hectare of eucalyptus in each studied region. A survey methodology was used as a strategy to cover a broad perspective using expert respondents. The regions studied on the Iberian Peninsula were the ones found suitable for eucalyptus plantations from an economic point of view. The studied regions were Huelva in the South West of Spain, Galicia in the North West of Spain and Portugal.

This diploma work handles how some parishes of the Swedish Church administrate their building properties.The report also includes how some external property managers in Sweden work with maintenance plans and other maintenance issues. Further, a number of deficiencies have been identified and suggestions to workarounds are treated. The conclusions drawn in this thesis are based on the author´s experience in the field, performed interviews, and literature studies. The result of the work shows a general lack of knowledge in many parishes what concerns regulatory requirements, properties with no maintenance plan and substandard supervision resulting in unnecessary and expensive repairs. Based on these results, different plans for the maintenance of the building properties of the Swedish Church has been proposed..

This report is an assessment of the feasibility of using aerial photographs to estimate number of stems per hectare in young forest stands, used together with upper height to determine the need for pre-commercial thinning or ordinary thinning cutting. Aerial photo-interpretation was conducted in 2007 on assignment of Stora Enso Skog AB. A mean height function based on stand age produced with data from Bergvik Skog AB?s 2006 forest inventory assessment was used as a proxy for upper height and used together with photo-interpreted number of stems per hectare to determine the need for thinning cutting according to Bergvik Skog AB?s definitions. The test area is located north of Falun on Bergvik Skog AB?s land.Flight altitude was approximately 900 m above ground and the aerial photos were taken by L&L Flygbildteknik AB.

The storm Gudrun January 8-9 2005 felled about 70 millions cubic metres forest in southern Sweden. The majority of the wind damaged forest was spruce (Picea abies). In order to decrease the risk of wind damages in the future other trees species are of interest for forestry in southern Sweden. The purpose of this master thesis was to study if larch were more wind tolerant than spruce. The method was to compare larch, Japanese larch (Larix kaempferi Lamb.), European larch (L.