Data on the characteristics of 400 Wisconsin dairy farmers by adopter category innovator-early adopter and early majority; early majority and late majority; and late majority and laggard) are compared with the characteristics of 200 Ohio farmers studied in 1961. The data on the Wisconsin dairy farmers were obtained/by personal interview in a 1962 state-wide random sample of all commercial farmers who were married and under age 65. The Ohio survey differed as to some of the selection criteria. Innovativeness was measured by the number of 10 improved farm management practices ever used. "F" ratios were computed between the adopter categories in the Wisconsin study, and in order to make comparable analysis of the Ohio data, estimates of the statistical variance were made and "t" scores computed. Two major exceptions that occurred between the results of the Ohio study and the Wisconsin study were: (1) enterprise specialization was positively associated with innovativeness in the Ohio study, but negatively associated in the Wisconsin study; and (2) in the Ohio study, those in the early adopter category had greater county Extension contact than those in the innovator category, the difference being statistically significant, whereas the innovators in the Wisconsin study had an average of 11.9 personal visits with Extension agents the preceding year compared with 6.5 visits for early adopters. Data in both studies were also analyzed as to whether the various characteristics differentiated at early adoption, middle adoption, or late adoption levels to the same extent. Tables provide the study data. (DB)