Soil classification deals with the systematic categorization of soils based on distinguishing characteristics as well as criteria that dictate choices in use.
Samples of soil horizons belonging to different soil types
Soil morphology is the branch of soil science dedicated to the technical description of soil, particularly physical properties including texture, color, structure, and consistence. Morphological evaluations of soil are typically performed in the field on a soil profile containing multiple horizons.
Field equipment for soil description
10YR hue in the Munsell soil color book
Soil texture-by-feel method
Soil texture triangle