Q. I take pretty good care of my lawn. But, it can make a good lawn better. If you've ever established a lawn from seed or sod, the first step you took was preparing the soil to give your grass a good place to grow. Then, you watered, fed, weeded and cut until you had a nice, healthy lawn. But, you have no control over what happens to the soil over time.
Nutrients leach out, and water drainage can change to too fast or too slow.
In addition, the organic matter can break down so the soil compacts, suffocating the roots. Here's a real-life example. The grassy approaches to the Lincoln Memorial in Washington, D.C. are trampled by thousands of feet every year. Since that time, though the foot traffic has remained constant, the lawns have remained lush and healthy. Till it in to a depth of 4 to 6 inches.