19th Century • 1868: Agricultural School was started at Saidapet, Chennai (Madras).
20th Century • 1906: The Saidapet Agricultural School was shifted to Coimbatore and foundation stone laid for Madras Agricultural College. • 1908: Students were admitted to education program leading to Licentiate in Agriculture (L. Ag.) • 1909: Opening of Agricultural College and Research Institute (AC & RI) by Sir Arthur Lawley. • 1920: The AC & RI was affiliated to Madras University. A new course of study leading to a three-year degree in Agriculture -B.Sc. (Ag.) was started. • 1945: Second Agricultural College was started at Bapatla (Now in Andhra Pradesh). • 1958: Regional Post-Graduate Centre was established to offer programs leading to master's degree in Agriculture & Horticulture. In Annamalai university, Agriculture teaching started leading to award of M.Sc.(Ag)in Horticulture first of its kind in India. • 1960: Integrated system with four year B.Sc. (Ag) degree program after pre-university education was introduced and subsequently doctoral programme in Agriculture was started. • 1965: Third Agricultural College was started at Madurai, Tamil Nadu and the Masters program at Madurai was introduced during 1969. • 1971: The Tamil Nadu Agricultural University came into existence with Coimbatore as its headquarters. The first vice chancellor Dr.G.Rengasamy was from ANNAMALAI UNIVERSITY which was having Faculty of Agriculture from 1958 onwards teaching agriculture and horticulture. • 1972: A separate Faculty of Horticulture was established and a degree program in Horticulture - B.Sc. (Hort.) was introduced. The College of Agricultural Engineering was established at Coimbatore and a bachelor's degree program in Agricultural Engineering - B.E.(Ag) was introduced. • 1973: Doctoral program was introduced in Horticultural College and Research Institute, Coimbatore. • 1975: Faculty of Post Graduate Education was established in TNAU, Coimbatore and master's and doctoral (1978) programs were started in Environmental Sciences and Biotechnology. • 1976: The Madras Veterinary College became constituent unit of TNAU and B.V.Sc. degree program was suitably restructured*. • 1977: Bachelor's degree (B.F.Sc.) program in Fisheries Science at Thoothukudi was started*. • Masters and doctoral program in Agricultural Engineering was introduced. • 1980: Bachelor's degree (B.Sc. (H.Sc.)) in Home Science was launched in Madurai Campus. • 1981: Master's program was introduced in Home Science College & Research Institute, Madurai and doctoral program in 1988. • 1989: Doctoral program in Agriculture was introduced in Agricultural college & Research Institute, Madurai; Masters program introduced in Forest College & Research Institute, Mettupalayam and Horticultural College & Research Institute, Periyakulam. • 1990: Master's program in Agriculture was introduced in Agricultural College & Research Institute, Killikulam, Thoothukudi district, Tamil Nadu and Doctoral program in Forest College & Research Institute, Mettupalayam. • 1998: B.Tech. (Food Process Engineering) introduced as self-supporting program.
21st Century • 2002: B.Tech. (Horticulture) and B.Tech. (Agriculture Biotechnology) introduced as self-supporting programs. • 2004: B.Tech. (Energy and Environmental Engineering) introduced as a self-supporting program. • 2005: Centennial celebrations of AC&RI, Coimbatore. • 2006: B.Tech. (Bioinformatics) introduced as a self-supporting program. • 2007: B.Tech. (Agricultural Information Technology) and B.S.(
Agribusiness Management) introduced as a self-supporting programs. Nanotechnology introduced in undergraduate curriculum. • 2008: Dual Degree Masters Program with Cornell University, Ithaca, USA introduced. Dual degree option with Dalhousie University, Canada established for undergraduate program in B.Tech.(Environmental Landscape Horticulture) • 2011: B.Sc. (Sericulture) introduced. M.Tech. (Ag.) in Nanotechnology introduced and M.Tech. in Environmental Engineering introduced. • 2012: Masters program introduced in Plant Genetic Resource and Remote Sensing. • 2017: Ph.D. (Agri) in Nano Science and Technology introduced. • 2026: Agricultural College & Research Institute, Chettinad became the TNAU's First constituent college to be Inaugurated by Chief Minister of State in-person. ==Notable alumni==