Sökning: "arable land"

Visar resultat 1 - 5 av 80 avhandlingar innehållade orden arable land.

  1. 1. Boreal land surface water and heat balance : Modelling soil-snow-vegetation-atmosphere behaviour

    Författare :David Gustafsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; soil; snow; land surface heat exchange; forest; arable land; eddy-correlation; Civil engineering and architecture; Samhällsbyggnadsteknik och arkitektur;

    Sammanfattning : The water and heat exchange in thesoil-snow-vegetation-atmosphere system was studied in order toimprove the quantitative knowledge of land surface processes.In this study, numerical simulation models and availabledatasets representing arable land, sub-alpine snowpack, andboreal forest were evaluated at both diurnal and seasonaltimescales. LÄS MER

  3. 2. När floden märkte marken : Om bruket av översvämningsmark längs med Emån och Ätran 1500–1910

    Författare :Oscar Jacobsson; Anders Wästfelt; Johan Berg; Jesper Larsson; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; historical geography; agricultural history; water history; floodplain; Sweden; wetland reclamation; meadows; Emån; Ätran; agricultural transformation; human-environment relations; geografi med kulturgeografisk inriktning; Geography with Emphasis on Human Geography;

    Sammanfattning : Large landscape transformations were an integral part of the agricultural revolution in Sweden, starting during the late 18th century. The 19th century was an especially intensive century when it comes to the transformation of the cultural landscape, not the least marked by extensive changes in the use of agricultural wetlands with interventions in watercourses, lowering of lakes and wetland reclamation. LÄS MER

  4. 3. Changing land cover as a driver of surface water browning

    Författare :Martin Skerlep; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organic matter; iron; land cover; browning; afforestation; biogeochemistry; spruce;

    Sammanfattning : Streams, rivers and lakes across wide areas of the Northern hemisphere have been subject to an increase in water color over the last decades. This increase, also known as browning, is a result of rising dissolved organic matter (DOM) and iron (Fe) concentrations in the water. LÄS MER

  5. 4. Plant community assembly during succession from arable fields to semi-natural grassland

    Författare :Barbara Christine Schmid; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diversity; arable-to-grassland succession; space-for-time approach; land-use history; plant community assembly; grazing management; connectivity measures; dispersal vector; vascular plants; grassland specialist conservation;

    Sammanfattning : Large areas of grazed, species rich semi-natural grassland were lost in Europe during the last two centuries and as a consequence led to decreases in grassland specialist species. Therefore, today the “restoration” of grassland on previously arable fields is recommended for the protection of grassland specialists. LÄS MER

  7. 5. Spatial and temporal dynamics of nutrients in two agricultural catchments in southeast Sweden

    Författare :Andreas Milver; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HYPE-model; phosphorus; nitrogen; arable land; discharge; water quality modeling; snowmelt; nutrient transport; local information;

    Sammanfattning : Many lakes and coast areas in Sweden and all over the globe suffer from eutrophication, caused by an overload of phosphorus (P) and nitrogen (N). In Sweden these emissions from point sources, e.g. LÄS MER