The Misunderstood Earthworm
Do earthworms have any value in soils? Yes and No. In gardens, but not in lawns, we might make out a case for them as processors of organic matter as well as redistributors of plant foods. This may be partial repay­ment for the energy and nutrients they use up in the course of their life. Another demerit is the harm they do in spreading plant diseases and in depositing unsightly casts on lawn surfaces. Perhaps it all boils down to this: Except in special cases, earthworms do not do enough harm to war­rant the cost and labor of destroying them, or enough good to justify special efforts and expenditures to increase their numbers. A good soil will naturally and automatically have an adequate supply of earthworms; a poor soil will not attract them or support them if they are introduced.