Adoption resulting from University of Nebraska-Lincoln Crop Management Diagnostic Clinic (CMDC) field days was evaluated using an on-line survey. Respondents reported significant gains in skills because of CMDC, but the gains were similar across skill areas. Adoption was affected by compatibility with the cropping system, relative advantage, complexity, and trialability of practices. Diagnostic skill was stronger for more observable and frequently occurring problems. Hands-on exercises and talking to agricultural professionals were more effective learning methods compared with radio or television messages. Satisfaction with the current CMDC format was high, but bringing in more outside resource people was suggested. (Contains 1 figure and 7 tables.)