Hey,

B.Sc. is a four year undergraduate course for which the minimum eligibility criteria is that the candidate shall have obtained atleast 50% aggregate in 12th exams

Top B.Sc. Agriculture Colleges in India are 

• Tamil Nadu Agriculture University, Coimbatore
• Acharya NG Ranga Agriculture University, Hyedrabad, Telangana
• Parul University, Vadodra
• Punjab Agriculture University, Ludhiana
• Mahatma Phule Krishi Vidyapeeth, Pune
• Govind Ballah Pant University of Agriculture and Technology, Uttrakhand
• Birsa Agriculture University, Ranchi

Hope it helps :)

Hey ! There are different colleges in different parts of india where B.sc agriculture is offered as one of their courses.Some of the best colleges which offer study in agriculture are:

• Punjab Agricultural University, Ludhiana
• Govind Ballabh Pant University of Agriculture and Technology, Pantnagar
• Mahatma Phule Krishi Vidyapeeth, Pune
• Indira Gandhi Krishi Vishwavidyalaya , Raipur
• Banaras hindu university
• Bundelkhand university
• Dr.bhimrao ambedkar university 
• Jaipur national university
• Lovely professional university , jalandhar

So , if you are opting for b.sc agriculture , then i would suggest you to go for any of these colleges.

Feel free to ask any further queries!