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The Densipan, a Diagnostic Horizon of Densiaqults for Soil Taxonomy
Author(s) -
Smith Guy D.,
Arya L. M.,
Stark J.
Publication year - 1975
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1975.03615995003900020036x
Subject(s) - usda soil taxonomy , horizon , soil water , soil science , geology , bulk density , mineralogy , environmental science , hydrology (agriculture) , geotechnical engineering , mathematics , soil classification , geometry
Some soils in Trinidad and Guyana that have the properties of Aquults also have a shallow extremely dense coarse‐silty horizon that forms a pan which is very slowly permeable to water and impenetrable to roots. The pan studied has a bulk density (when saturated) of about 1.95 g/cm 3 . It is not cemented, but is extremely firm whether wet or dry due to its density. It is proposed that this pan be added to the diagnostic horizons and called a densipan (L. densus , compact). Aquults that have such a pan should be distinguished as a new great group, the Densiaquults.