Twenty-two Kentucky counties have been surveyed and published using the classification scheme of the U.S. Department of Agriculture. These counties and the dates of the field survey are: Adair (1961), Bath (1959), Calloway (1937), Christian (1912), Clark (1961), Fayette (1931), Fulton (1961), Garrard (1921), Graves (1941), Jessamine (1915), Logan (1919), McCracken (1905), Madison (1905), Marshall (1938), Mason (1903), Mercer (1930), Muhlenberg (1920), Rockcastle (1910), Scott (1903), Shelby (1916), Union (1902), Warren (1904). The maps and reports on Adair, Bath, Calloway, Clark, Fulton, Graves, Logan, Marshall and Mercer Counties are still available (1965) through: Agronomy Department, University of Kentucky, Lexington. The other reports listed above are out of print, but copies may be viewed at the Library, College of Agriculture, University of Kentucky, Lexington, or other public libraries. (Dates refer to field survey).
Bailey, Harry Hudson, "Soil Surveys in Kentucky" (1965). Agronomy Notes. 197.