Biology and Ecology of Earthworms is established as a key valuable text for students of agriculture, soil science, and soil invertebrate zoology and ecology. This is the 4th Edition of the popular textbook which reviews all aspects of earthworm biology and ecology.  The book has been fully revised and updated throughout. Particular changes include: new treatments of earthworm taxonomy, diversity, migration and geographical distribution; interactions between earthworms and other soil organisms, especially microorganisms and soil-borne pests and diseases; as well as the importance of earthworms in organic waste management.