Key to Great Groups
IDB. Other Cryolls that have a natric horizon. Natricryolls, p. 582
IDB. These are the Cryolls that have a natric horizon but do not have a duripan. The soils are rare in the United States and probably elsewhere. Few series have been established in the United States for this group, and subgroups have not been developed. Because these soils are of such limited extent and have a small range of properties, few subgroups seem to be needed.
Natricryolls are the Cryolls that have a natric horizon but do not have a duripan with an upper boundary within 100 cm of the mineral soil surface.
Key to Subgroups
IDBA. All Natricryolls. Typic Natricryolls
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