Nitrogen leaching after application of increasing rates of slurry to winter rye and maize (lysimeter experiments)

abonado fraccionado application date azote cultivos de invierno culture d'hiver date d'application exigence des plantes fertilisation fertilizer application leaching lessivage du sol lisier necesidades de las plantas nitrate nitrates nitratos nitrogen plant requirements secale cereale slurry split dressings winter crops zea mays