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The Densipan, a Diagnostic Horizon of Densiaqults for Soil Taxonomy¹

ABSTRACT

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/cm³. 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.

¹ Contribution from the Dept. of Soil Science, Univ. of the West Indies, St. Augustine, Trinidad.

² Soil Scientists.

Received for publication June 14, 1974. Accepted for publication December 5, 1974.