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NAL Agricultural Thesaurus
U.S. Department of Agriculture

Concept Breadcrumbs

Fields of Study > soil science > soil > soil morphological features > soil horizons > hardpans > duripans
Fields of Study > soil science > soil morphology > soil morphological features > soil horizons > hardpans > duripans
Preferred Term:

duripans

Definition:
A duripan (L. durus, hard; meaning hardpan) is a subsurface horizon that is cemented by illuvial silica to the degree that less than 50 percent of the volume of air-dry fragments slake in water or during prolonged soaking in acid HCl). Duripans vary in the degree of cementation by silica. In addition, they commonly contain accessory cements, chiefly calcium carbonate.
Concept Schemes:
NALT Full
Broader Concept:
hardpans
Related Concepts:
URI:
https://lod.nal.usda.gov/nalt/306927
Download this Concept:
RDF/XMLCreated 2017-08-16, last modified 2017-11-10