Aeration is the mechanical removal of cores or plugs from the soil in a turf grass lawn. The plugs are removed with a machine called an aerator. The aerator rolls over the grass with hollow tines. The tines are pressed into the soil with weight or driven by a cam shaft. Soil pushes through the hollow tines, creating a plug. These plugs are typically 2-3.5 inches long depending on soil type, moisture, compaction, and the amount of thatch buildup in a lawn. These plugs contain soil, roots, thatch and of course grass.
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