Here are 12 Soil Orders-
Gelisols- soils with permafrost within 2 m of the surface
Histosols- organic soils
Spodosols- acid forest with a subsurface accumulation of metal-humus complexes
Andisols- soils formed in volcanic ash
Oxisols- Intensely weathered Soils of tropical and subtropical environments.
Vestisols - clayey soils with high shrink/swell capacity
Aridisols- CaCO3-containing soils of arid environments with subsurface horizon development
Utilisols- strongly leached soils with a subsurface zone of clay accumulation and <35% base saturation
Mollisols- grassland soils with high base status
Alfisols- moderately leached soils with a subsurface zone of clay accumulation and >35% base saturation
Inceptisols- soils with weakly developed subsurface horizons
Entisols- soils with little or no morphological development
This information was found on the University of Idaho web site for the College of Agriculture and Life Science. here is the link!
http://soils.cals.uidaho.edu/soilorders/index.htm
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