Nitrogen uptake and nitrate leaching after application of straw, catch crops and animal slurry: Effects of soil type, crop rotation and cropping history

absorption de substances nutritives azote barley catch cropping cebada cerdo cultivo intermedio cycling danemark denmark dinamarca enfouissement enterrado farmyard manure fertilisation fertilizer application fumier hordeum vulgare incorporation leaching lessivage du sol lisier lolium nitrate nitrates nitratos nitrogen nutrient uptake orge paille paja porcin rotation culturale rotational cropping slurry soil types straw swine type de sol