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Turfgrass dethatching and aeration are two distinct cultural management practices which are used to promote a healthier, more vigorous turf. "Turf" is actually the grass and soil which comprise the "lawn". It is important to manage the soil which indirectly affects the growth and well being of the grass

Dethatching involves the mechanical removal of thatch. It consist of tightly intermingled layer of dead and decaying turfgrass tissue derived from leaves, stems, stolons and roots. Leaf clippings contribute very little to thatch accumulation.

Dead and decaying roots, rhizomes, stolons, and shoots are major contributors to thatch since these structures resist decomposition.

Located between the green vegetation and the soil surface, thatch accumulates when turfgrass organic matter production exceeds decomposition.

Thatch forms to a much greater extent with stolon and rhizome producing grasses. Therefore bermuda grass and zoysia would tend to produce more thatch than ryegrass and tall fescue which are bunch grasses. KBG and buffalograss are intermediate in thatch production.