Hello there!
There are various colleges which provide low fee structure in comparison to other. They also have scholarships for helping students.
Your grades are good.
Generally, different colleges have different fee structure for the admission in the required course.
Kindly go through the brochure for the details and also seek information from the admission department of the concerned college for the same.
Good Luck!

First you should decide in which state you want admission. There are private universities which offer BSc agriculture but there fees will be high. If you want a government college, you should give ICAR AIEEA exam conducted by NTA every year.

ICAR AIEEA  stands for Indian council of agriculture research all india entrance examination for admission. The exam is held in online mode and it contains maximum marks  720 marks. It contains 180 questions. There are negative marking, so you need to take care of it as well. To give the exam, you should have studied PCB/PCM in your +2.

You can check official website of NTA for further details.

Hope this information helps you.

Regards