Search for dissertations about: "pure forest"

Showing result 1 - 5 of 20 swedish dissertations containing the words pure forest.

  2. 1. Natural regeneration and management of birch

    Author : Felicia Dahlgren Lidman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : This thesis offers guidance for those who want to naturally establish, maintain and manage birch in monocultures and mixed stands. Silver and downy birch are the most common broadleaf tree species in northern Europe. In Sweden, the two species together make up approximately 12% of the standing forest volume. READ MORE

  4. 2. Improved seed handling techniques for Juniperus polycarpos : implications for active restoration of degraded Juniper forests in Iran

    Author : Abolfazl Daneshvar; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Juniperus polycarpos (K. Koch) is one of six native juniper forest tree species in Iran whose population size is declining continuously. The ultimate aim of the research presented in this thesis was to increase the regeneration potential of J. READ MORE

  5. 3. Bark beetles facilitate the establishment of wood decay fungi

    Author : Ylva Strid; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Forests in the northern hemisphere are largely dominated by conifers and provide a key habitat for a multitude of species. Wood decay fungi, i.e. basidiomycetes, are important for nutrient cycling. READ MORE

  6. 4. Applications of visible and near infrared spectroscopy for sorting and identification of tree seeds

    Author : Mostafa Farhadi; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Seeds are the most commonly used regeneration material for reforestation purpose; hence interest in “precision sowing” among nurseries is high due to the high cost of containerized seedling production. In addition, the increased interest in growing hybrid larch in commercial forestry has raised concerns about the purity of hybrid larch seed lots, as there are large proportions of pure parental seeds mixed with hybrid larch seed lots. READ MORE

  7. 5. Techniques and Algorithms for Autonomous Vehicles in Forest Environment

    Author : Ola Ringdahl; Thomas Hellström; Jürgen Burstler; Hans Gripentrog; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Autonomous navigation; Robotics; Obstacle avoidance; Computer science; Datavetenskap;

    Abstract : This thesis describes an ongoing project of which the purpose is designing and developing techniques and algorithms for autonomous off-road vehicles. The focus is on some of the components necessary to accomplish autonomous navigation, which involves sensing and moving safely along a user-defined path in a dynamic forest environment. READ MORE