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JDA.Durixeralfs

Key to Subgroups

JDAA. Durixeralfs that have a natric horizon. Natric Durixeralfs
Soil Families and Soil Series in Subgroup

JDAB. Other Durixeralfs that have, above the duripan, one or both of the following:
1. Cracks that are 5 mm or more wide through a thickness of 30 cm or more for some time in normal years and slickensides or wedge-shaped aggregates in a layer 15 cm or more thick; or
2. A linear extensibility of 6.0 cm or more. Vertic Durixeralfs
Soil Families and Soil Series in Subgroup

JDAC. Other Durixeralfs that have, in one or more subhorizons within the argillic horizon, redox depletions with croma of 2 or less and also aquic conditions for some time in normal years (or artificial drainage). Aquic Durixeralfs
Soil Families and Soil Series in Subgroup

JDAD. Other Durixeralfs that have both:
1. An argillic horizon that has both:
a. A clayey particle-size class throughout some subhorizon 7.5 cm or more thick; and
b. At its upper boundary or within some part, a clay increase either of 20 percent or more (absolute) within a vertical distance of 7.5 cm or of 15 percent or more (absolute) within a vertical distance of 2.5 cm, in the fineearth fraction; and
2. A duripan that is strongly cemented or less cemented in all subhorizons. Abruptic Haplic Durixeralfs
Soil Families and Soil Series in Subgroup

JDAE. Other Durixeralfs that have an argillic horizon that has both:
1. A clayey particle-size class throughout some subhorizon 7.5 cm or more thick; and
2. At its upper boundary or within some part, a clay increase either of 20 percent or more (absolute) within a vertical distance of 7.5 cm or of 15 percent or more (absolute) within a vertical distance of 2.5 cm, in the fineearth fraction. Abruptic Durixeralfs
Soil Families and Soil Series in Subgroup

JDAF. Other Durixeralfs that have a duripan that is strongly cemented or less cemented in all subhorizons. Haplic Durixeralfs
Soil Families and Soil Series in Subgroup

JDAG. Other Durixeralfs. Typic Durixeralfs
Soil Families and Soil Series in Subgroup

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