The Australian Soil Classification provides a framework for organising knowledge about Australian soils. It provides a means of communication among scientists and land managers. It is useful for those involved in environmental studies and for teachers of soil science. Since its publication in 1996, the Australian Soil Classification has been widely adopted and formally endorsed as the official nation system. It has proven to be of particular value in land resource survey and research programs. This revised edition includes some significant changes to the Tenosol soil order and these will substantially improve the utility of the system in southern and western parts of the continent.