Highly decomposed organic material formed under conditions of waterlogging. It contains few recognizable remains of the original plants.

the bottom soil in a watercourse; dark, usually black, earth that is capable of absorbing much water, often consisting of decomposing plant matter; also refers to material removed in the process of excavating.

(=sapric soil material) - Organic soil material in an advanced stage of decomposition making it impossible to identify plant parts with the unaided eye. Muck has the least amount of plant fiber, the highest bulk density, and the lowest water content at saturation of all organic soil material.

a soil consisting of partially decomposed plant remains where the decomposition has progressed to a point where the contributing plant species cannot be identified; an organic soil as opposed to mineral soils.

Debris removed during excavation.

Highly decomposed organic material in which the original plant parts are not recognizable.

Dark-colored, finely textured, well-decomposed organic soil with little or no recognizable fiber.

Dark, finely divided, well decomposed organic soil material.

The dark, wet, richly aromatic, organic soil of northern wetlands. Composed primarily of well decomposed fen vegetation such as sedges.

See Organic Soil.

Muck is a soil made up primarily of humus from drained swampland. It is known as black soil in The Fens of eastern England, where it was originally, mainly fen and bog. It is used there, as in the United States, for growing specialty crops such as onions, carrots, celery, and potatoes.