Sökning: "Kalkning"

Visar resultat 21 - 25 av 30 uppsatser innehållade ordet Kalkning.

  1. 21. Tillförsel av använda fosforfilter påverkar inte tillväxten eller fosforupptaget hos korn

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Crop Production Ecology

    Författare :Emma Tylstedt; [2012]
    Nyckelord :Fosfor; Filtra P; Polonite; Filtralite; Hyttsand; kalkning; struktureffekt;

    Sammanfattning : The eutrophication of inshore seas, lakes and watercourses is mainly due to leaching of nitrogen and phosphorus (P) from agriculture. Many efforts are made to reduce the lea-kage of phosphorus in Sweden and the Baltic Sea countries. Phosphorus is also a finite resource and the mining of good quality raw material gets more and more difficult. LÄS MER

  3. 22. Surhetstillståndet i bäckar uppströmskalkdoserare i Dalarnas län

    Kandidat-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Goulnara Khoussainova; [2010]
    Nyckelord :försurningsbedömning; buffertkapacitet; surhetstillstånd; kalkning; vattenkemisk analys;

    Sammanfattning : The acid deposition of sulphur- and nitrogenoxides from combustion of coal and oil cause acidification that lowers pH and gives increased contents of metals and altered aquatic biodiversity in the stream. The liming of lakes and streams, which was introduced to resist the acidification, demand large economic resourses despite of the decreased deposition of the acidifyng substances. LÄS MER

  4. 23. Utvärdering av sjökalkningens eventuella effekter på öring och röding i jämtländska fjällsjöar

    Magister-uppsats, Ekologi, miljö och geovetenskap

    Författare :Joakim Norberg; [2009]
    Nyckelord :Försurning kalkning fjällsjöar röding;

    Sammanfattning : .... LÄS MER

  5. 24. C and N mineralization and earthworm populations in a Norway spruce forest at Hasslöv (SW Sweden), 25 years after liming

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Janneke Ravenek; [2009]
    Nyckelord :carbon; nitrogen; mineralization; liming; acidification; earthworm;

    Sammanfattning : During the last decades of the 20th century, acid rain affected many areas in Europe and NorthernAmerica. Soil acidification was considered a large problem for forest ecosystems, because it wasexpected that tree growth would be hampered by low pH, nutrient deficiencies and highconcentrations of free Al. LÄS MER

  7. 25. Effect of liming and free Ca2+ on Cd uptake of carrots, Daucus carota

    Master-uppsats, SLU/Horticulture (until 121231)

    Författare :Anna Holmkvist; [2009]
    Nyckelord :Cd; carrots; Cd uptake; Ca; substrate; nutrient solution ; calcium; cadmium;

    Sammanfattning : The level of cadmium (Cd) in Swedish arable land has increased during the last century and the average concentration of Cd in the plough layer is today 0.23 mg/kg. The increase is mainly due to anthropogenic activities such as phosphorus fertilizing, liming, import of feed, and atmospheric deposition from industrial emissions. LÄS MER