Sökning: "Organic farming"

Visar resultat 11 - 15 av 50 avhandlingar innehållade orden Organic farming.

  1. 11. Plant-based biogas production for improved nutrient management of beetroot in stockless organic farming

    Författare :Anita Gunnarsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Transition from a nutrient management system based on green manure (GrM system) to one based on biodigested plant material produced within the crop rotation (BG system) was investigated in crop sequences including clover-grass, beetroot and cereals. The overall hypothesis was that transition would improve nitrogen (N) availability. LÄS MER

  3. 12. Effects of created habitats on farmland biodiversity

    Författare :Annelie Jönsson; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; agricultural intensification; brown hare; common pheasant; farming intensity; granivorous passerines; grey partridge; habitat creation; landscape heterogeneity; pollinators;

    Sammanfattning : Agricultural intensification has caused severe declines among biodiversity in European farmland over the last half century. The transformation of the agricultural landscape has led to reduced availability of key resources such as food, nesting habitat and shelter. LÄS MER

  4. 13. Effects of Farming Practice on Pollinators and Pollination across Space and Time

    Författare :Georg Andersson; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Several studies have found that organic farms support higher biodiversity, but results vary between studies such that some also show no or even negative effects. There can be many reasons why studies comparing organic and conventional farming show conflicting results. LÄS MER

  5. 14. Induction of a non-allergic inflammation in the human respiratory tract by organic dust

    Författare :Britt-Marie Larsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Swine farmers; airway inflammation; bronchial responsiveness; organic dust; interleukins; lekotrienes;

    Sammanfattning : Swine farming is an occupation associated with high exposure levels to organic dust, but gases such as ammonia and hydrogen sulphide are also contributing to the potentially hazardous exposure. The prevalences for respiratory symptoms, chronic or work-related, are increased among swine farmers, compared to both the normal population as well as other farming categories. LÄS MER

  7. 15. Simulation of Phosphorus, Zinc and Cadmium Mass Flow in Dairy Farming Systems

    Författare :Anna-Karin Modin Edman; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Miljöstudier; Environmental studies; management; Cd; Zn; P; mass balance; system analysis; simulation;

    Sammanfattning : A simulation model, FARMFLOW, was developed for the calculation of phosphorus (P), zinc (Zn) and cadmium (Cd) stocks, flows and balances in different parts of a dairy farming system. The simulated continuous change in element stocks within the farming system enables evaluation of the long-term effects of management practices. LÄS MER