Earthworm eggs will stay dormant in the soil until the proper level of calcium becomes available. Earthworms open the plow sole to let oxygen in, carbon dioxide out. Earthworms feed on dead or decaying organic matter, and then deposit castings in the soil. These castings are richer in plant food than the soil. They also increase soil porosity, aeration, drainage, plus mixing the soil.
Earthworms burrow several feet deep.
Earthworms do not like unfavorable soil conditions. They cannot live in strong acid soils, or in to dry or waterlogged soils. Also there are a lot more little micro bugs that will produce plant food in the soil due to the increased oxygen in the soil. Secondly, we found that a magnesium imbalance will cause the soil to be tighter, and cause water to run off, carrying soil particles, nitrogen, potassium, phosphorus. Calcium has the ability to make the soil act like a sponge to absorb water and oxygen.