Loamy and Clayey Soils
“Loamy and Clayey Soils” have USDA textures of loamy very fine sand and finer. All mineral layers above any of the layers meeting the requirements of any F-indicator(s), except for indicators F8, F12, F19, F20, and F21, have a dominant chroma of 2 or less, or the thickness of the layer(s) with a dominant chroma of more than 2 is less than 15 cm (6 inches). Also, except for indicator F16, nodules and concretions are not considered to be redox concentrations. Use the following F-indicators for loamy or clayey mineral soil materials.