Greetings,
if you want to do B.Sc. Agriculture after 12th than the generally acceptable minimum eligibility criteria is 50% aggregate in your 12th boards and biology as a subject.
here is a link to the colleges offering the course in India (it is not an exhaustive list)
https://university.careers360.com/colleges/list-of-bsc-in-agricultural-science-degree-colleges-in-india
good luck
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