[SP report, 19: Modelling nitrogen leaching from agriculture: Effect of fertilizer regulations and land use control introduced from the mid eighties until August 1997 [DAISY]]

abonos azote calidad del agua consommation consumo consumption crops cultivos danemark denmark dinamarca engrais farmland farmyard manure fertilisation fertilizer application fertilizers fumier land use leaching lessivage du sol nitrate nitrates nitratos nitrogen planification planning plante de culture simulation models soil types terre agricole tipos de suelos type de sol utilisation des terres water quality