Soil roundworms are not necessarily parasites. Free living ones have huge populations in the soils and sea bottoms. In ecology handbooks there is often shown a

Soil roundworms are not necessarily parasites. Free living ones have huge populations in the soils and sea bottoms. In ecology handbooks there is often shown a study that found more kilograms of roundworms than kilograms of deer living in the same places. They are highly influential in fertile soils.