Humustept PH
A soil profile of a well drained, gravelly Humustept in the Philippines. The soil formed in stratified layers of material, including volcanic ash. It has a dark, humus-rich umbric epipedon about 28 cm thick. Below this epipedon is a cambic horizon that extends to a depth of about 55 cm. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Humustepts have a mollic (rich in humus and bases) or umbric (humus-rich with low base saturation) epipedon. Parent materials are mostly residuum, colluvium, or alluvium in mountain settings. Some have been influenced by volcanic ash. These soils commonly have a brownish cambic (minimal soil development) subsoil horizon. Some have root-limiting bedrock or a dense, compact layer in the profile. In the United States, Humustepts are found mostly in coastal California and in Hawaii.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Humustept PH
A soil profile of a well drained, gravelly Humustept in the Philippines. The soil formed in stratified layers of material, including volcanic ash. It has a dark, humus-rich umbric epipedon about 28 cm thick. Below this epipedon is a cambic horizon that extends to a depth of about 55 cm. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Humustepts have a mollic (rich in humus and bases) or umbric (humus-rich with low base saturation) epipedon. Parent materials are mostly residuum, colluvium, or alluvium in mountain settings. Some have been influenced by volcanic ash. These soils commonly have a brownish cambic (minimal soil development) subsoil horizon. Some have root-limiting bedrock or a dense, compact layer in the profile. In the United States, Humustepts are found mostly in coastal California and in Hawaii.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...