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Categorized under " General" Definition as written by Calalily: It's the material that builds up in your lawn when you leave the grass clippings especially if you let the grass get too tall before you cut it. Definition as written by Floridian: Thatch is a layer of dead stems that builds up beneath certain grasses and ground covers, reducing water and nutrient penetration.
Definition as written by Magpye: Any material that does not quickly decompose. When a lawn becomes 'clogged' with old drying grass cuttings and matted leaves, this is referred to as a build-up of thatch. Often, it does not decompose fast enough for a healthy lawn and needs to be removed, either manually or by a thatching machine.
Definition as written by Terry: In the U.S., the definition of thatch is usually limited to the excess buildup of plant material in lawns.
Outside the U.S., thatch describes dry plant stalks such as straw, reeds, rushes and sedges, which have been used for centuries to construct roofs in both tropical and temperate climates.
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