Human-altered soil materials
Human-altered soil materials have undergone some form of intentional human-induced alteration, including deep plowing to break up root-restrictive subsoil layers, excavation (such as for a gravel pit), and surface compaction in order to puddle water (such as for rice paddies). Although highly altered from their natural state, they have not been transported from another
location.
These human-constructed terraces in Nepal are used for growing rice and vegetables. They make up a large-scale anthropogenic landform with both human-altered and human-transported materials. (Photo courtesy of Dr. John Galbraith)
Illustrated Guide to Soil Taxonomy (p. 3-77)
Human-altered soil materials
Human-altered soil materials have undergone some form of intentional human-induced alteration, including deep plowing to break up root-restrictive subsoil layers, excavation (such as for a gravel pit), and surface compaction in order to puddle water (such as for rice paddies). Although highly altered from their natural state, they have not been transported from another
location.
These human-constructed terraces in Nepal are used for growing rice and vegetables. They make up a large-scale anthropogenic landform with both human-altered and human-transported materials. (Photo courtesy of Dr. John Galbraith)
Illustrated Guide to Soil Taxonomy (p. 3-77)