[Ethical accounting for animal husbandry in Norway. The use of resources in the livestock farm and influence of the external environment]

abonos appropriate technology azote consumo de energia energy consumption energy sources engrais farm management fertilizers fosforo gestion de l'exploitation agricole leaching lessivage du sol manejo de fincas metano methane nitrogen noruega norway pesticide pesticides phosphore phosphorus plaguicidas pollution by agriculture pollution par l'agriculture resource substitution substitution des ressources