Search for dissertations about: "coniferous"

Showing result 1 - 5 of 66 swedish dissertations containing the word coniferous.

  2. 1. Organohalogens in coniferous forest soil

    Author : Olof Hjelm; Linköpings universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Abstract : This thesis is focused on naturally produced organohalogens in soil. It was long assumed that organohalogens found in the environment were mainly of anthropogenic origin, but recent research has shown that large amounts of naturally produced organohalogens are stored in terrestrial environments. READ MORE

  4. 2. Organic acids and siderophores in forest soil solution

    Author : Sara J M Holmström; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acidification; aluminium; ash treatment; canopy tree; column switching; coniferous; DOC; HPLC-MC; hydroxamate; liming; low molecular weight; organic acids; podzol; porous graphitic carbon; siderophore; soil solution; Chemistry; Kemi;

    Abstract : .... READ MORE

  5. 3. The spectral reflectance of coniferous tree stands and of barley influenced by stress : an analysis of field measured spectral data

    Author : Johan Kleman; Stockholms universitet; []
    Keywords : spectral reflectance; field measurement; middle infrared; crops; fertilisation; irrigation; coniferous forest; helicopter; measuring geometry;

    Abstract : This thesis focuses on the spectral signatures for vegetation. Knowledge about the spectral characteristics of different vegetation types is imperative for an efficient use of existing remote sensing systems, and also to provide guidelines for sensor development. READ MORE

  6. 4. Monoterpenes from the boreal coniferous forest : their role in atmospheric chemistry

    Author : Robert Janson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The goal of this work has been to increase our knowledge of the role of the monoteipenes emitted by the boreal coniferous forest in atmospheric chemical processes. To this end, measurements of air concentrations and emission rates have been made in forests of Scots pine (Pinus sylvestris) and Norwegian spruce (Picea abies) at 4 sites throughout Sweden, during the summers of 1989 and 1990. READ MORE

  7. 5. Nitrification and Nitrifying Bacterial Communities in Coniferous Forest Soils : Effects of Liming and Clear-Cutting

    Author : Jenny Bäckman; Wietse de Boer; Linköpings universitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : This thesis deals with the effects of liming and clear-cutting on nitrification in hemi-boreal and northern temperate coniferous forest soils. The approach has been to study both the potential nitrification and the community structure of the ammonia-oxidising bacteria, which carry out the first step of autotrophic nitrification. READ MORE