Material & Methods

Methods:

  • 12 in-depth interviews
    • Horse keepers, farmers, biogas companies and garden owners
  • An online-survey with 80 respondents
    Horse keepers, farmers, biogas companies and garden owners
  • Literature studies.
  • Receiving processed data in a 5×5 km grid from Metson et al. (2022):
    • Crop nutrient demands
    • Manure supplies of NPK from farm animals (excluding horses)
  • Contacting organisations
    To gain information about locations of horses, or of factors that favours horse keeping.
    • Theoretical calculations:
      • The nutrient balance in manure and crop demand in Sweden
        • Calculations in QGIS and Excel
      • The optimised way of manure transport to where the crop nutrient demand is for Sweden as a whole,
        • Optimisation model
      • The theoretical biogas potential of horse manure in Sweden.
        • Calculations in QGIS and Excel