Orders divided into suborders by difference in climatic environment. Suborders divided into great groups by similarities in profile characteristics. Great groups further divided into subgroups. Then families and finally series. The series name is equivalent to the common name of the soil.
Texture is one of the more important physical properties of soil.
Silt 0.002-0.05 mm in diameter. Clay less than 0.002 mm As particles in the soil become smaller, the ratio of the particles surface area to their mass becomes larger. Soil orders Entisols Mineral soils with only the beginning of horizon development. From recently formed or exposed parent material. Inceptisols Mineral soils more highly developed than entisols.