CSSC Great Groups

Order: Brunisolic

Great Group	Description
Melanic Brunisol (IA) Subgroups	Brunisolic soils that have an Ah or Ap horizon ≥10 cm in thickness and pH of ≥5.5 (0.01 M CaCl₂) Full Description
Eutric Brunisol (IB) Subgroups	Other Brunisolic soils that have either no Ah horizon or an Ah (or Ap) horizon <10cm in thickness and pH of ≥5.5 (0.01 M CaCl₂) Full Description
Sombric Brunisol (IC) Subgroups	Brunisolic soils that have an Ah or Ap horizon ≥10 cm in thickness and pH of <5.5 (0.01 M CaCl₂) Full Description
Dystric Brunisol (ID) Subgroups	Other Brunisolic soils that have no Ah horizon or an Ah (or Ap) <10 cm in thickness and pH of <5.5 (0.01 M CaCl₂) Full Description

Source: The Canadian System of Soil Classification, Third Edition. 1998.

Links:
CSSC > The CSSC Orders > The CSSC Great Groups