Figure 14.—Indicator A9, 1 cm Muck.
This photo accompanies Figure 14.—Indicator A9, 1 cm Muck. [Field Indicators of Hydric Soils in the United States].
John Gagnon, Resource Soil Scientist, Edenton, NC examines this Duckston soil for the presence of muck.
Soils that have a layer of muck 1 cm (0.5 inch) or more thick with value of 3 or less and chroma of 1 or less and starting at a depth ≤15 cm (6 inches) from the soil surface may qualify for Indicator A9 (1 cm Muck). Muck is sapric soil material with a minimum content of organic carbon that ranges from 12 to 18 percent, depending on the content of clay. Organic soil material is called muck if virtually all of the material has undergone sufficient decomposition to limit the recognition of plant parts. Mucky peat (hemic material) and/or peat (fibric material) do not qualify. Generally, muck is black and has a “greasy” feel; sand grains should not be evident.
Figure 14.—Indicator A9, 1 cm Muck.
This photo accompanies Figure 14.—Indicator A9, 1 cm Muck. [Field Indicators of Hydric Soils in the United States].
John Gagnon, Resource Soil Scientist, Edenton, NC examines this Duckston soil for the presence of muck.
Soils that have a layer of muck 1 cm (0.5 inch) or more thick with value of 3 or less and chroma of 1 or less and starting at a depth ≤15 cm (6 inches) from the soil surface may qualify for Indicator A9 (1 cm Muck). Muck is sapric soil material with a minimum content of organic carbon that ranges from 12 to 18 percent, depending on the content of clay. Organic soil material is called muck if virtually all of the material has undergone sufficient decomposition to limit the recognition of plant parts. Mucky peat (hemic material) and/or peat (fibric material) do not qualify. Generally, muck is black and has a “greasy” feel; sand grains should not be evident.