Provides limited information in response to the question, but describes a readership analysis service offered by the Field Studies and Training Division of the Extension Service, U.S. Department of Agriculture. It has analyzed extension publications from 46 states and Puerto Rico.
Australia: Compiled and published by Information and Extension Training Branch of the Queensland Department of Primary Industries with the Assistance of Funds from the Commonwealth Extension Services Grant, Brisbane, Australia
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 137 Document Number: C20867
Australia: Compiled and published by Information and Extension Training Branch of the Queensland Department of Primary Industries with the Assistance of Funds from the Commonwealth Extension Services Grant, Brisbane, Australia
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 137 Document Number: C20863
USA: Extension Service, U.S. Department of Agriculture, Washington, D.C.
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D08951
Notes:
Page 7 in Lucinda Crile, Findings from studies of bulletins, news stories, and circular letters. Extension Service Circular 488. Revision of Extension Service Circular 461, which it supersedes. May 1953. 24 pages. Brief summary of U.S. Extension Service Circular 78. 1928. 17 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 156 Document Number: D07311
Notes:
Paul Hixson Collection., 1 page., A classic and creative "how-to" resource that "can be of great help when your copy seems too simple, or when you don't know what to say, but you want it to sound good."
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 1 Document Number: B00165
Notes:
AgComm Teaching, astract available in Main Stacks 630.73 Un364r, Washington, D.C.: Federal Extension Service, U.S. Dept. of Agriculture. 3pp. (ER & T - 171)