Lumbricus
The earthworms provides good topsoil when they convert a lot of decaying organic matter. Furthermore, oxides earthworm agree times ground to make it light and airy. In this way, thriving plants and microorganisms better, like rainwater better percolates into the ground
Regnormene (Lumbricus) giver god muldjord, da de omsætter en masse henfaldende organisk stof. Desuden ilter regnormenes gange jorden, så den bliver let og luftig. På den måde trives planter og mikroorganismer bedre, ligesom regnvandet bedre siver ned i jorden