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Five categories were distinguished as presented in Tab. Here, not the sites were grouped, but sampling occasions, as tillage practices at a site might vary from one sampling to another.

For checking the tillage impact over several years, we calculated the mean number of all tillage events per year (including ploughing, shallow tillage etc.) and separately the mean number of ploughing events per year for a time- span of 5–7 years before each sampling, including the year of sampling.

Information available through Arrest is provided for informational purposes only.All records are subject to change and, while every effort is made to ensure the information available is current and accurate, it may contain errors.Although it is generally accepted that tillage affects While earthworms have been investigated comparatively soil fauna, the effects of tillage practices are not so often with respect to management practices, mesofauna easy to predict for a given situation, as the nature of groups, like microannelids (i.e.enchytraeids and some tillage impacts seems related to a variety of factors like other species), are covered less frequently.The parameters studied were abundance of microannelids, vertical distribution of microannelids and species composition.

Ten samples per sampling date were taken at each monitoring site.Two field sites were managed according to organic farming regulations with crop rotation including catch crops and periods of reduced tillage frequency.To assess the influence of tillage on microannelids, the data from field sites were grouped further according to the time span between sampling and last tillage event in the year of microannelid sampling.The aims are to detect soil threats and to establish reference data in order to support favourable soil management (Barth et al. In the federal state of Schleswig-Holstein there are at present 37 soil has been documented by a number of studies and should monitoring sites, representing common land-use types, not be underestimated (Didden 1990, 1991, Van Vliet et soil types and soil substrates. 1996, separate these from short-term changes (time scale: Röhrig et al. On the other hand, long-term effects of certain tillage al. Further, species number was strategies are probable.seems less prone to short-term fluctuations than e.g.Their contribution to decomposition processes and microstructure formation has been documented by a number of studies and should monitoring sites, representing common land-use types, not be underestimated (Didden 1990, 1991, Van Vliet et soil types and soil substrates. 1996, separate these from short-term changes (time scale: Röhrig et al. On the other hand, long-term effects of certain tillage al. Further, species number was strategies are probable.