A national study (the sixteenth annual study of its kind) examined the supply and demand for teachers of vocational agriculture in 1980. To obtain data pertaining to supply and demand for vocational agriculture teachers, researchers mailed questionnaires and follow-up letters and made telephone calls to all institutions preparing teachers in vocational agriculture as well as to the offices of state supervisors in agriculture. Information regarding numbers of graduates qualified and the number of teaching positions available were then tabulated for each state and each institution preparing teachers. The study revealed a turnover rate of 12.5 percent requiring 1,561 teacher replacements for 12,510 positions in 1980. The number of persons qualified to teach agriculture was the lowest in the last 11 years. Thus, a shortage of vocational agricultural teachers continues to exist. However, the shortage occurs in certain areas of the country in an irregular pattern. Recommendations called for increased efforts to recruit students into vocational agricultural education, to reduce teacher turnover, and to make salaries in shortage states competitive with those in surplus areas. (MN)