In addition to microbes, there may be 10 or more earthworms in every square foot. In fact, earthworms are a good barometer of good, productive soil. Earthworms turn the soil, and convert organic material into nutrients for plants. A healthy earthworm population in an acre of soil can turn over eight tons of soil in a year. That’s a lot of work.
Good soil with five percent organic matter can hold almost two gallons of water per cubic foot of soil. A yard size of 1,000 square feet with that amount of organic matter can hold almost 2,000 gallons of water. This helps create longer root systems in grass plants and makes them more resistant to disease.
Using organic fertilizers and minimizing the application of chemical fertilizers can go a long way toward maintaining a healthy population of microbes and earthworms. Good, healthy soil is the secret to a good healthy lawn and garden.