Includes biographical information on Thompson family (circa 2002); Clippings and other ephemera (undated, 1936-1984); Dairy Herd Improvement Association (DHIA) and farming professional involvement (1957-1973); Farm conservation plans (1943, 1978); and Photographs of David Afdahl family (undated, circa 1927-1945) and Ruth Ellen Thompson (undated, circa 1934 and 1947).

David Orlin Afdahl (July 14, 1927-March 7, 2005) was born to Herman N. (1904-1984) and Gladys, nee Owens, Afdahl (1902-1964), the oldest of three children. David grew up on the family farm southwest of Hammond in St. Croix County, Wisconsin. David was graduated from Baldwin High School and attended UW-River Falls (then River Falls State Teacher's College), where he graduated with a degree in agricultural education. ǂb Ruth Ellen Thompson (1934-2017) was born to Margaret Norma Tubman (1910-2003) and Otto Emil Thompson (1906-2000), the second oldest of three girls. She attended Clear Lake High School, Wisconsin and Luther College in Decorah, Iowa.

Ruth "Ruthie" and David were married on August 22, 1953 in Spring Valley. The couple had four children and worked as dairy farmers on the Afdahl family farm. David "Dave" Afdahl was professionally active and held various positions on the Wisconsin Dairy Herd Improvement Cooperative (affiliation of Dairy Herd Improvement Association) over the length of his farming career.