This is a process that relieves compaction of the soil and allows nutrients to get to the root zone more quickly. Soil compaction occurs most frequently from traffic on your lawn. The clay-based soil here in Talbot County compacts very easily.
The structure of the soil itself becomes compromised when it is compacted. Soil structure is important because it determines the ability of a soil to hold and conduct water, nutrients, and air necessary for plant root activity.
Core aeration will leave a "plug" of soil on the surface of the lawn that will break down in 1-2 weeks. It's similar to a farmer plowing his fields. Seed, whether grass or vegetable, does not grow well in soil that is compacted.
This process is the single most important cultural practice that can be done for a lawn. We recommend it whenever we see soil that has been compromised due to compaction