%A Dr Konstantin Becker %A Prof. Dr. Guenter Leithold %T Winterraps in der Fruchtfolge des ?kologischen Landbaus %X The cropping of rape seed is rather uncommon in organic farming. Still, rape seed cropping can contribute to efficient nutrient utilization (especially of nitrogen) in a crop rotation. This paper presents results on nitrogen dynamics after perennial clover grass as affected by rape seed cropping compared to winter wheat. It could be shown, that Nmin amounts in the soil are lowered by rape seed compared to winter wheat. %D 2009 %K rape seed, efficient nutrient utilization, crop rotation %L orgprints14569