A study of the need for inservice education and training among the staff of the Namibian extension service revealed that the service has approximately 100 field staff who have very different and often patchy preservice training but who have acquired considerable experience. Workshops with extension staff members were then held to identify their training needs. On the basis of information gained from observation of supervisory training activities and a training needs assessment questionnaire, a modular comprehensive inservice program was recommended as the most appropriate form of inservice training for the extension staff. The program, which used extensive approaches and methods, included a course on people and organizations in society, and seven agricultural specialist subjects. A program structure based on on-the-job training and distance learning methods was recommended, and a training development plan was drafted. (Appendixes constituting about half of this document provide information on the current training of existing field-level staff and their training needs, a project itinerary, a consolidated job description, the proposed inservice program, a preliminary list of resource centers, pros and cons of on- versus off-the-job training and distance education, module outlines, and a workshop report. Contains 37 references.) (MN)