Complex sentence: George A. Zentmyer, professor and chairman in the plant pathology department at the University of California, Riverside, arranged for Dr. Gill to be appointed adjunct professor, with his own laboratory at the campus from 1968 to the early 1980s.
Split into simpler sentences: George A. Zentmyer, professor and chairman in the plant pathology department at the University of California, Riverside. Dr. Zentmyer arranged for Dr. Gill to be appointed adjunct professor, with his own laboratory at the campus from 1968 to the early 1980s.