Sökning: "Wood cutting"

Visar resultat 16 - 20 av 31 avhandlingar innehållade orden Wood cutting.

  1. 16. Resistance and recolonization of bryophyte assemblages following disturbances : - detecting patterns and exploring mechanisms

    Författare :Martin Schmalholz; Kristoffer Hylander; Jari Kouki; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bryophytes; boreal forest; boulders; clear-cutting; disturbance; establishment; insect outbreaks; microtopography; recolonization; resistance; spatial heterogeneity; succession; wildfires; Biology; Biologi; Plant Ecology; växtekologi;

    Sammanfattning : Disturbances are ubiquitous features of most northern forest ecosystems. The subsequent response of plant assemblages on both short (resistance or not) and long term (recolonization or not) will depend on a number of factors operating at several spatial scales. LÄS MER

  3. 17. Samhävd och rågång. Om egendomsrelationer, ägoskiften och marknadsintegration i en värmländsk skogsbygd 1630-1750

    Författare :Staffan Granér; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; property rights; entitlements; common-rights; modernisation; property relations; enclosure; land consolidation; open fields; institutional change; laws; legal practice; court rolls; iron mills; market integration; field-system; agrarian history; forest history; Värmland; swiddening; charcoal-burning; timber cutting;

    Sammanfattning : THY NEIGHBOURS PROPERTY. Property Relations, Enclosures and Market Integration in a Forest District of Central Sweden 1630-1750. Written in Swedish with a Summary in English. The development towards more exclusive and private agrarian property rights has been considered one of the most important and crucial aspects of the modernisation process. LÄS MER

  4. 18. Efficient utilization of sawlogs using scanning techniques and computer modelling

    Författare :Anders Berglund; Arto Usenius; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

    Sammanfattning : The main question asked of the work described in this thesis was howthe sawing of logs into sawn timber can be performed more efficientlywith respect to the choice of raw material, volume and value yield in thesawing and in the grading of the sawn timber produced.The development of industrial computed tomography scanning providesinformation about the external and internal properties of a sawlogat production speed. LÄS MER

  5. 19. Aspects of heterogeneity : effects of clear-cutting and post-harvest extraction of bioenergy on plants in boreal forests

    Författare :Marcus Åström; Christer Nilsson; Katherine Frego; Umeå universitet; []
    Nyckelord :aspect; clear-cutting; disturbance; habitat quality; liverworts; logging residues; mosses; resilience; slash; slope; topography;

    Sammanfattning : Abstract. The objectives of this thesis are to evaluate (1) the influence of slope aspect on boreal plant responses to clear-cutting and (2) the effects of post-harvest extraction of bioenergy (logging residues or slash) on plant composition, richness and performance in clear-cuts. LÄS MER

  7. 20. Stumps as fuel : the influence of handling method on fuel quality

    Författare :Erik Anerud; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Wood fuels make a key contribution to renewable energy sources in the Nordic countries. The growing demand for forest biomass can be partly met by utilising energy-rich stumps left after clear cutting. As fuel, stump wood is commonly associated with a high presence of contaminants, resulting in high ash content. LÄS MER