Fig. 1

The relative abundance of prokaryotic phyla of the microbial community in applied sludge (SL), unamended soils (S1, S2) and soils amended with sludge (S1SL, S2SL). The graph describes only the taxonomic units that constituted > 1% of total relative abundance. All remaining taxa, i.e. those showing < 1% of total relative abundance are included in the category others.