N-balance for mineral N on spring barley cropped sandy loam and coarse sandy soil with mineral and organic fertilizers

abonos nitrogenados absorption de substances nutritives azote catch cropping cerdo cultivo intermedio danemark denitrification denmark dinamarca engrais organique hordeum leaching lessivage du sol lisier loam soils nitrogen nitrogen fertilizers nutrient uptake organic fertilizers porcin primavera printemps sandy soils slurry sol sableux sol sablolimoneux spring suelo arenoso suelo franco swine