ABSTRACT This research work examined in detail the collection development practices in university libraries using T.Y Danjuma Library, Ajayi Crowther University as a case study in carrying out this research work. A descriptive survey design was adopted in carrying out the study. To achieve this goal the study employed a primary data, by administering a structured questionnaire for 55 Professional librarians and lecturers. Data was analyzed using frequency counts and simple percentage distr...