To improve vocational educational programs in agriculture, occupational information on a common core of basic skills within the occupational area of the tree service worker is presented in the revised task inventory survey. The purpose of the occupational survey was to identify a common core of basic skills which are performed and are essential for success in the occupation. Objectives were accomplished by constructing an initial task inventory to identify duty areas and task statements for the occupation. The initial task inventory was reviewed by consultants in the field, and 158 tasks were identified. A random sample of 76 tree service firms was obtained. Data were collected utilizing employer and employee questionnaires. Twenty-five questionnaires were returned of which 24 were usable. A compilation of basic sample background information is presented on size of tree service firm, total work experience, employment at current job, and preparation as a tree service worker. A compilation of duty areas of work performed and work essential for the occupation is given. Percentage performance by incumbent workers and the average level of importance of specific task statements are presented in tabular form. (Author/EC)