Hello,

You can appear tests like:-

1. AGRICET:- organized by Acharya NG Ranga Agricultural University. You can join  in the same university for UG or diploma course.
2. CCS HAU entrance exam :-  organized by CCS Haryana University. You can admission in the university in various UG programs.
3. GB PUAT:-  organized by GB Pant University.
4. ICAR AIEEA UG :- Organized by Indian council of  agricultural Research. This is a national exam and on this basis you can take an admission in any university which accepts this exam and take admission in any UG program

Basically all the universities have their own entrance to intake students. You select any university and go through that University's admission process.

Or you can Appear ICAR AIEEA where you will get lots of options to choose.

Hope it helps!