Generally this is semi-carbonised plant residuals formed in water-saturated environments like marshes, swamps, bogs, fens and muskeg. This entry include types like moss peat, sedge peat and grass peat.
The physical properties of the peat moss depend on its organic matter, water and air content, botanical decomposition and the degree of such decomposition. It is surface-mined and may range from plant remains that are highly cohesive and fibrous to thoroughly decomposed, widely amorphous material. When squeezed, the former type would exude clear to slightly coloured water and the latter would show little or no separation of liquids from solids.
Generally, peat that is air-dried has low density, high water content and high compressibility. Peat moss in its natural state, can hold 90% or more of water by weight when saturated. Used as fuel and garden compost. Bulk density: 80-500 kg/m3.
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