Can you suggest some good colleges for B.Sc in agriculture or B.Sc in biotechnology? I scored 56% in PCB (CBSE board).

Some of the top universities or institutes that you must apply for are:

IISc Bangalore

IISERs (consider all IISERs almost the same, however IISER Pune has an edge)

Jamia Millia Islamia University

University of Delhi (in colleges like Hindu College, Hansraj, Acharya Narendra Dev, Bhaskaracharya, etc)

Azi