White Worms - They are an opaque white in colour, hence the name and occur naturally in soil. Well worked compost heaps will normally be holding a large population of these worms. They cannot stand dry soil, other places were they abound is in damp leaf litter and the banks of ponds and streams. The worms prefer to remain near the surface but dry conditions will drive them down deeper in the soil. They perform the same functions as earthworms and study has suggested that the actually turn over more soil than the earthworm and control the pH of the soil and prevent it becoming to acidic.