[Water environment survey, 1990, technical report, 39: Soil survey on catchment areas]

agua de drenaje agua del suelo ammonia ammoniac aquatic organisms calidad del agua danemark denmark dinamarca drainage water eau de drainage eau de ruissellement eau du sol eau souterraine environmental protection escorrentia farmyard manure fosforo fumier groundwater hidrologia hydrodynamics hydrodynamique hydrologie hydrology monitoring nitrate nitrates nitratos organisme aquatique phosphore phosphorus protection de l'environnement runoff soil types soil water type de sol vigilancia water quality