Search for dissertations about: "P fertilisation"

Showing result 1 - 5 of 7 swedish dissertations containing the words P fertilisation.

  2. 1. Soluble and Plant Available Phosphorus in Acid Soils

    Author : Ann-Mari Fransson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; solubilisation mechanisms; Phosphorus extractions; Oxalate extraction; P fertilisation; Plant ecology; Växtekologi;

    Abstract : The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. READ MORE

  4. 2. Phosphorus speciation in Swedish agricultural clay soils : influence of fertilisation and mineralogy

    Author : Ann Kristin Eriksson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Phosphorus (P) is an important element for crop production, but build-up of excess soil P can promote P leaching and eutrophication of surface waters. To better understand the dynamics of P release from soil to waters, more knowledge is needed about sorption patterns and P speciation in agricultural soils. READ MORE

  5. 3. Phosphorus chemistry in managed forest soils : effects of weathering and wood ash fertilisation

    Author : Marius Tuyishime; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Weathering and Podzolisation are key mechanisms that transform primary mineral apatite into a phosphorus (P) pool with low solubility. In addition, intensive forest harvesting removes nutrients from the soil, reducing P availability. READ MORE

  6. 4. Nutrient supply to reed canary grass as a bioenergy crop : intercropping with legumes and fertilisation strategies for phosphorus and potassium

    Author : Eva Lindvall; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Growing energy demand and global warming are promoting research into potential new sources of renewable energy. Fossil fuels need to be replaced with sustainable energy sources to decrease emissions of greenhouse gases. Production of bioenergy from herbaceous crops on agricultural land is one alternative. READ MORE

  7. 5. Improved farm soil mapping using near infrared reflection spectroscopy

    Author : Johanna Wetterlind; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Information on soil texture, soil organic matter content (SOM), nutrient status and pH is fundamental for efficient crop production and for minimising negative effects on the environment. Farmers obtain this information, on which decisions on fertiliser and lime requirements are based, through farm soil mapping. READ MORE