Compacted Georgia clay soils impede the movement of air, water and nutrients to the grass roots.
Roots require oxygen to grow and to absorb nutrients and water.
When compacted, soil contributes to the accumulation of thatch because restricted oxygen levels impair the activity of earthworms and other thatch-decomposing organisms.
Thatch accumulates faster on compacted soils and heavy clay soils than on well aerified soils.
When thatch depth exceeds 1/2" it becomes a problem, reducing water movement and encouraging shallow, weak root systems. Thick thatch also can become a home for insects and disease.
Many people complain about moss growing in their lawns in Atlanta. Lawns that drain poorly due to soil compaction are displaying a "Moss Welcome" sign.
Core aeration involves the removal of small soil plugs or cores out of the lawn. Known as a core aerator, the machine extracts 1/2 to 3/4 inch diameter cores of soil and deposits them on your lawn. Aeration holes are typically 1-3 inches deep and 2-6 inches apart.
Core aeration is a recommended yearly lawn care practice to control thatch buildup, especially on compacted, heavily used turf.
