muck

A sapric is a subtype of a histosol where virtually all of the organic material has undergone sufficient decomposition to prevent the identification of plant parts. Muck is a sapric soil that is naturally waterlogged or is artificially drained. Classification The soils are deep, dark colored, and friable, often underlain by marl, or marly clay. World Reference Base The World Reference Base for Soil Resources (WRB) defines "sapric" (sa) as a histosol having less than one-sixth (by volume) of the organic material consisting of recognizable plant tissue within 100 cm of the soil surface. Canada Muck soils fall under the Organic Order in the Canadian system of soil classification. Muck soils are organic soils, with at minimum of 30% organic matter and a depth of at least 40 cm.