Translations:Benutzer:Arian/Klett-Mini-Test/1132/en

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The humification of the organic ground layer is attended to by a world of microbes and small creatures that is characteristic of the particularities of the site. Common to all soils, however — in place of the red compost worm — is the appearance of the earthworm (*Lumbricus terrestris*), the master of soil fertility. Alone, on sandy soils poor in both lime and clay, its number of individuals