Keys to Soil Taxonomy: Great Groups

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Order: Aridisols
Suborder: Durids

Code	Name	Description
GCA	Natridurids	Durids that have a natric horizon above the duripan.
GCB	Argidurids	Other Durids that have an argillic horizon above the duripan.
GCC	Haplodurids	Other Durids.

Source: Keys to Soil Taxonomy, Eighth Edition. 1998.

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