Essays about: "tree stems"

Showing result 1 - 5 of 94 essays containing the words tree stems.

  1. 1. Orsaker till och åtgärder för att förbättra ekonomin i förstagallringar på Åland

    University essay from SLU/School for Forest Management

    Author : Robert Hellgren; [2024]
    Keywords : förstagallring; ekonomiskt utfall; Åland;

    Abstract : Röjningsbehovet på Åland är stort och andelen eftersatta ungskogar ökar för varje år. Det ekonomiska utfallet i förstagallringar är väldigt dåligt och i många fall obetydlig, vilket gör att intresset för att röja är litet. Det leder många gånger till att ungskogarna röjs för sent och ibland uteblir röjningen helt. READ MORE

  3. 2. Can precommercial thinning be used to create more diversity after planting spruce?

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Astrid Bygge; [2024]
    Keywords : Forestry; pre-commercial; stand structure; heterogeneity; silviculture; mixed forests; monoculture; Picea abies; Betula spp.;

    Abstract : Mixed forests will harbour other ecosystem services than a planted coniferous monoculture. This study used early results from a long-term experiment to examine if different precommercial thinning treatments can be used to increase diversity in planted stands of Norway spruce (Picea abies) mixed with high densities of natural regeneration of birch (Betula spp. READ MORE

  4. 3. Growth and quality of silver birch with different improvement levels

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Hanna Liebner; [2023]
    Keywords : Betula pendula Roth; genetic improvement; tree breeding; diameter growth; stem quality; branches quality;

    Abstract : Silver birch is the most important broadleaf tree species in the context of wood production in Fennoscandia stating 12.9% of the total volume in Sweden (Nilsson et al., 2021). READ MORE

  5. 4. Tree growth and field vegetation in forest edge zones on a property in southeast Sweden

    University essay from Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Author : Pieter van Tongeren; [2023]
    Keywords : tree growth; diversity; field vegetation; edge zones; edge effect;

    Abstract : Summary  In the 1990s a new way of thinking about forestry started. One of the effects of the changing silvicultural practices was that the size of clearcuts became smaller. As the felling areas were reduced in size, the areas where young and older forest meet grew, with this also the occurrence of edge zones increased. READ MORE

  6. 5. The ability to create mixed stands by planting Norway spruce and Scots pine every second row

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Eva Higgins Andersson; [2022]
    Keywords : Local site index; seedlings every second row; regeneration; biodiversity; climate change; establishment;

    Abstract : Swedish forests primarily consist of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.). READ MORE