Dr.G.Mariappan completed his M.Sc. (Agri.), Ph.D., in Agronomy from TNAU, Coimbatore, India. He was a recipient of UGC Rajeev Gandhi National fellowship award for the year 2012-15, best Agricultural Officer award from district Collector Vellore in the year 2016, and he has got many society awards for his outstanding contribution to in the field of Agricultural extension as well as student community. He has published more than 10 books and he has act as organizing secretary and co organizing secretary in many National and International seminars/conferences. At present he is working as Agricultural officer in soil survey as well as extension in the state department of Agriculture, Vellore.