USDA soil taxonomy
compare World Reference Base for Soil Resources
Alfisols [edit]
Andisols [edit]
Aridisols [edit]
Entisols [edit]
Gelisols [edit]
Histosols [edit]
Inceptisols [edit]
Mollisols [edit]
Oxisols [edit]
Spodosols [edit]
Ultisols [edit]
Vertisols [edit]