[Effect of fertilizing on pipe drainage and surface runoff in the Western Norway. Nutrient runoff from leys]

abonos compuestos absorption de substances nutritives application rates azote chemical composition composition chimique compound fertilizers contenido de materia seca crop yield dose d'application dry matter content escorrentia feed grasses fosforo gramineae leaching lessivage du sol leys lisier losses nitrogen noruega norway nutrient uptake nutrientes nutrients perte phosphore phosphorus pradera temporal prairie temporaire rendement des cultures rendimiento de cultivos ruissellement runoff slurry substance nutritive