Yeah, you are eligible  for B.Sc agriculture. Give first preference to government colleges. In case, government college cut-off is much higher than your score, then  you can choose private colleges. In private colleges, you will get admission if you have required cut-off (not very high cut-off is required). Basically, you can explore your available options in Tamil Nadu Agricultural University. The link for it's webpage - https://tnau.ac.in/

Wish you all the best with your career!