Sökning: "birch bark"

Visar resultat 1 - 5 av 25 uppsatser innehållade orden birch bark.

  1. 1. Analysis and Valorization of Bark from Silver Birch, Scots Pine, and Norway Spruce : Compositional analysis of bark from common Swedish trees in forestry, to optimize sustainability procedures and monetary value of bark residue

    Kandidat-uppsats, Umeå universitet/Kemiska institutionen

    Författare :Isak Lindbäck; [2022]
    Nyckelord :;

    Sammanfattning : Silver birch, Scots pine, and Norway spruce are the three most common types of trees in Sweden and make up to 90% of standing volume in Swedish forests (Skogsstyrelsen 2015, 3). With millions of cubic meters of wood being cut down annually, bark and other residues that cannot be used for sawn timber is left over and burnt for energy. LÄS MER

  3. 2. Mixed Stand vs Monoculture : a Simulation Study Assessing Growth and Profitability of Norway spruce and Birch in Mixtures and Pure Stands

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Babatunde Dosumu; [2022]
    Nyckelord :N.spruce-birch stands; monoculture; thinning treatment; mixed forest;

    Sammanfattning : Picea abies L. Karst (N. spruce) monocultures dominate the forest landscape of southern Sweden due to their suitability for the prevalent site conditions, well established silviculture, and profitability. However, disturbances such as windthrow, bark beetle damage, and Heterobasidion root rot pose a risk to N. LÄS MER

  4. 3. Nio trähus ifrån 1200-talet - Hur har de kunnat bevaras?

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för kulturvetenskaper (KV)

    Författare :Henrik Johansson; [2022]
    Nyckelord :authenticity; granary; heritage; interlocking joint; log house; Middle Ages; timber house; 13th century; timmerhus; knuttimring; knuttimrad stuga; liggtimmer; 1200-tal; timmerstuga; medeltiden; högmedeltiden; tidigmedeltid; Ingatorp; kyrkbod; autenticitet; spåntak; nävertak; takved; syllstensrad; Färsnäs; Fåsås; Zorns gammelgård; Zorngården; takytterskikt; trähus; väggspån; stolpunderrede; Älvdalen; dubbelkyrkhärbre; loftsboden; Dalarna; eldhus; härbre; kulturarv; kulturvård;

    Sammanfattning : The oldest profane log timber houses in Sweden dates back to the 13th century. This study investigates 9 of them. All of the houses are built with interlocking joints and the chosen timber are pine or fir. They are rather modest in size. LÄS MER

  5. 4. Skogsägarens riskhantering – storm, brand & granbarkborre i Sverige

    Kandidat-uppsats, SLU/School for Forest Management

    Författare :Gustav Thorwall; Jacob Nord; [2022]
    Nyckelord :skogsskador; skogsskötsel; riskmedvetenhet;

    Sammanfattning : Klimatförändringarna är ständigt pågående och märkbara i det svenska skogsbruket. Skogen växer med anpassning till klimatet vilket gör denna process extra tydlig i samband med att klimatet förändras. Skador på skog har alltid funnits i en mer eller mindre omfattning. Under de senaste tjugo åren utmärker sig vissa år mer än andra. LÄS MER

  7. 5. Utvärdering av metod för att morfologiskt särskilja björkarterna Betula pendula och Betula pubescens

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Pontus Nykvist; [2022]
    Nyckelord :björk; morfologi; artbestämning; fällningsmetoden; Silver birch; Downy birch;

    Sammanfattning : Birch is the third most common tree species in Sweden and has previously been seen as a weed in the forests. In the last 20 years, birch has had a clearly increasing trend in Swedens growing timber stock, but there are still many knowledge gaps regarding management, regeneration, processing, and its impact on the environment. LÄS MER