Soil compaction and lawn aeration
Hollow tine aeration is a most on all lawns
The most common reason that a lawn becomes compacted is through use. Mowing, playing football and a family barbecue all contribute to the particles compacting. This problem becomes worse if the soil is wet. Air becomes forced out and does not get replaced. The soil will dry out without containing any air pockets.
Even if you don’t use your lawn that much, over time it does become compacted. This happens through rain fall, increase in root mass and gravity.