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The properties represented by soil subgroups are;
a)Central concept of a Great Group (i.e. Typic)
b)Intergrades to other Orders, Suborders, or Great groups
c)Intergrades to a different moisture regime.
d)Subgroups with abnormal properties not indicate of any other order.
Examples:
1)Lithic Dystrocryepts – hard bedrock contact at <50 cm.
2)Cumulic Hapustolls – thick mollic epipedons due to accumulation of sediments or colluvium.
3)Ustic Haplargids – aridic but intergrades to ustic moisture regime.
jim items answered the question on October 8, 2018 at 11:28
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