Worms are great garden helpers.
It has been estimated that each year on a typical acre of land, somewhere between 16,000 and 30,000 pounds of soil pass through the guts of worms. The soft, mustard-colored coils of worm waste deposited at the mouths of burrows enrich the soil. The tunnels created by worms enable air to circulate through the soil and reach organisms that depend on it. The burrows also provide the means by which water filters down to the roots of plants and excess moisture is drained away. In fact, a worm can eat its own weight in food each day.