Definition
Soils with subsurface accumulation of high activity clays, rich in exchangeable aluminium.

Distribution
The total area of Alisols has not been accurately ascertained as these soils have only been mapped in association with the Acrisols. However, it is thought to be in the region of 100 million hectares. Alisols are typically found in the southeastern United Staes, Latin America, Indonesia and China. They are associated with Acrisols, Lixisols and Ferralsols.