Soil structure and fauna. Artwork of a vertical section through soil,showing various structures and fauna. The surface layer includes organic mulch,the bottom layer is rocks. From left to right,both at the surface and within the soil are: a woodlouse,a fungus fruiting body (mushroom) with its underground hyphae,a centipede,a beetle larva (white),nematode worms (below beetle larvae),a common earthworm (lower down),roots of a clover-type legume plant (with bacterial nodules,next to nematode worms),an ant-hill (mound with tunnel,upper right),a slug,a mole cricket,and another (white) earthworm |