N. John Hansen earned a BS in agricultural economics from Oregon State College in 1941. He began his work for the Extension Service in 1943 as a Linn County Extension Agent with responsiblity for the county's 4-H program. From 1949 until 1972, he was Staff Chair in Polk County. Hansen served as an area water resource specialist in Salem for 18 months prior to his retirement at the end of 1973.
Hansen was active in the National Association of County Agricultural Agents and served as both vice-president and president of the organization. Hansen advocated for 4-H in Oregon, specifically development of the Oregon 4-H Center and establishment of an endowment for the Polk County 4-H Leaders Association.
The N. John Hansen Scrapbook, which was assembled by Hansen, documents Hansen's involvement in the National Association of County Agricultural Agents (NACAA) and the activities of other Oregon Extension Service staff. The scrapbook consists predominantly of photographs; it also includes newspaper clippings, ephemera, and an essay on the history of the Bull Association of the Oregon County Agents Association.
The photographs are primarily souvenir group photographs of Oregon attendees at the NACAA annual meeting; some of these images also include spouses and children. Individuals are identified for many of the photographs; Extension agents O.E. Mikesell, Ken Minnick, and Ben Newell are included in several of the group photographs. Of special note are photographs of the annual meeting when it was held in Corvallis in 1970. The scrapbook also includes individual and group photographs of Oregon State Extension Service staff conducting their work; several images of Frank Ballard are part of the scrapbook. Images of tours of local farms and the Oregon Garden that Hansen organized in the 1990s are also included in the scrapbook. The photographs are primarily b/w; some color prints are included.
The scrapbook also includes information about Extension agents Mel Hagood and Roger Fletcher.