Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. combination inorganic/organic material
7. soil
8. [soil by form or function]

Anotations

Scope note:

Sections of earth together with the grass growing on them, held together with matted roots, usually square or oblong in shape and of moderate thickness, cut out or pared off from the surface of grass land.