There’s a yardstick among gardeners that good, rich soil with lots of actively decaying organic matter in it should have about a dozen or more earthworms (Lumbricus terrestris) in each cubic foot. But ...
We all know worms. Earthworms, worms for fishing, worms in our garden. There are even some kinds of worms that are used to clean up oil spills, but that’s not what we are talking about here.
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