Cambic Horizon - Soil Geography of the USA: A Diagnostic-Horizon Approach - page 124

13.3 Classification of Soils with Cambic Horizons

Cambic horizons occur in soil series of five orders, 26 suborders, and 63 great
groups (Table 13.2 ). Soil series with cambic horizons are most abundant in the
Mollisols (3,173), followed by the Inceptisols (2,550), Andisols (856), Vertisols
(398), and Aridisols (384). By definition, cambic horizons cannot occur in Alfisols,
Entisols, Histosols, Oxisols, Spodosols, and Ultisols, and they likely occur but have
not been reported in Gelisols. A total of 7,600 soil series have a cambic horizon,
which constitutes 34 % of all soil series identified to date.

Table 13.2 Distribution of soils containing a cambic
Order Suborder Great groups No. of soil series

Andisols Aquands Cryaquands 8

Endoaquands 6

Epiaquands 4

Melanaquands 1

Vitraquands 5

Cryands Fulvicryands 24

Haplocryands 52

Vitricryands 134

Torrands Haplotorrands 6

Vitritorrands 5

Udands Fulvudands 91

Hapludands 87

Hydrudands 34

Melanudands 5

Ustands Haplustands 38

Vitrands Udivitrands 103

Ustivitrands 12

Xerands Haploxerands 61

Melanoxerands 6

Vitrixerands 174

Total 856

Aridisols Cambids Aquicambids 13

Haplocambids 370

Petrocambids 1

Total 384

Inceptisols Aquepts Cryaquepts 47

Endoaquepts 261

Epiaquepts 72

Gelaquepts 2

Halaquepts 68

Humaquepts 146

Cryepts Dystrocryepts 85

Haplocryepts 174

Humicryepts 76

(continued)