Original:  approximately of land are owned by the United States government and held in trust for Native American tribes and individuals .U.S. Department of the Interior. Office of the Special Trustee. History. In Australia, Aboriginal land trusts are a type of URLanisation that holds the freehold title to an area of land on behalf of a community of Aboriginal and/or Torres Strait Islander people.
Revised:  approximately of land are owned by the United States government and held in trust for Native American tribes and individuals is sometimes referred to as a land trust. In Australia, Aboriginal land trusts are a type of URLanisation that holds the freehold title to an area of land on behalf of a community of Aboriginal and/or Torres Strait Islander people.
Edit intent: clarity