In accordance with the provisions of sections 375b to 375f of this title and notwithstanding the provisions of any other law, the Secretary of the Interior, hereinafter styled the Secretary, is authorized, in connection with any Federal irrigation project for which water is available, and after finding that such action will be in furtherance of the irrigation project and the Act of June 17, 1902 (32 Stat. 388), and Acts amendatory thereof or supplemental thereto, hereinafter styled the Reclamation Act, to dispose of any tract of withdrawn public land which, in the opinion of the Secretary, has less than sufficient acreage reasonably required for the support of a family and is too small to be opened to homestead entry and classed as a farm unit under the Reclamation Act.