Figure 2 in Soil Oligochaeta communities after 9 decades of continuous fertilization in a bare fallow experiment

Figure 2. Boxplot representing the total abundance (expressed as individuals m-2) of enchytraeids according to fertilizers (from the left to the right): basic (alkaline) amendments, organic amendments (manure), ammonium-based nitrogen fertilizers, nitrate-based nitrogen fertilizers, phosphate fertilizers, potassium fertilizers, and control (without amendments). Fertilizer treatments with the same letter are not different at p = 0.05. N beneath treatment codes is the number of plots sampled per treatment group.