Figure 5

Sampling protocol used with a regular grid of 10 x 10 sampling points and a 5 m inter-sample distance. A total of 400 soil samples were collected for the various soil analyses and 100 soil monoliths for earthworm species counts. The location of tree species (>5 m diameter at breast height, DBH) within the surveyed 0.2 ha plot are shown together with the soil pit where the earthworms were sampled, identified and counted, as well as the four soil cores taken for physical and chemical determinations from each of the 100 sampling points.