The Division of Plant Science was established in 1955 when the Faculty of Agriculture was re-organized. At that time, the division absorbed the plant science subjects of the Department of Agronomy and the Department of Horticulture. The Faculty of Agriculture was then comprised of four departments and two divisions: the Departments of Agricultural Economics, Agricultural Mechanics, Poultry Science and Soil Science, and the Divisions of Animal Science and Plant Science. In 1955, V.C. Brink became the chair of the division and retained this post until 1970. During Brink's leadership of the division, the faculty expanded. In 1955, there were three professors of horticulture and two professors of agronomy. A sixth full-time faculty member was hired in 1960, and a seventh in 1962. Several sessional lecturers were also hired. The division offered courses in agronomy, horticulture and plant science, and in 1964 plant protection courses were introduced. In 1963, a Master's Degree in Plant Science was offered, and in 1966, a Doctoral program was instituted. In response to increased enrolment and the availability of funds, a new building was constructed. The new complex, the present H.R. MacMillan Building, housed both the Faculty of Forestry and the Faculty of Agriculture. It was officially opened in July 1967. In 1969, a new curriculum was introduced that contained thirteen graduate-level courses. In addition, all courses offered by the division were now categorized under the heading of Plant Science. At that time, the division was renamed the Department of Plant Science.