Hii Dear!!

Greetings for your results!!
As you mentioned about your score and willing to know can you get top bsc agriculture college or not. So here you need to understand that eligibility criteria and selection  for Bsc agriculture varies from institute to institute. Some instutes give admissions on the basis of 12th scores and some takes their own entrance exams.
First you should know the eligibility criteria of the course. Here it is:

1) Candidate should have passed 10+2 with chemistry, Biology and physics as their main subject.

2) Minimum marks required varies from institute to institute.

3) Candidate's age should be 18 years .There is no upper limit in Bsc agriculture course.

Some common entrance exams that you can apply to get a best college are:

A)  BCECE : Bihar combined Entrance competitive Examination.

B) AP EMCAT

C)  PAU entrance exam : conducted by Punjab Agriculture University

D) ICAR entrance exam

However, there are some prestigious colleges also where you can apply directly by going on their official website. Here I am mentioning some of the top colleges:

1) Indian Agriculture research institute( IARI) , New Delhi

2) Punjab Agriculture University ( PAU) , Ludhiana, punjab

3) Tamil Nadu Agriculture University , Combiatore

4) Chaudhary charan Singh Haryana Agriculture University , Hissar, Haryana

5) G B Pant University of Agriculture and Technology (GBPUA&T), Pantnagar

6) Orissa University of Agriculture and Technology (OUA&T), Bhubaneswar

7) Chandra Shekhar Azad University of Agriculture and Technology (CSAUA&T), Kanpur

So mainly your selection is based on the selection criteria of the institute in which you will apply or the entrance you would give.

Hope you got your answer,
Best wishes.