%0 conference lecture %@ %A Rupp, H., Meissner, R. %D 1993 %J Central and Eastern European Regional Meeting of SECOTOX about Environmental Toxicology: Pathways of Anthropogenic Pollutants in the Environment and their Toxic Effects %T Experimental results about the behaviour of nitrogen in soils, ground water and surface water in an intensively farmed fen area %U %X