Hello,
.
Yes, ofcourse you will get. Forget about the past and focus on the future.
.
You have failed in maths, that's not a problem. Have you again attempted and passed it?
If yes, then best of luck focus on the future, forget the past
.
If no, then do it first.
.
Before applying for it, check out the eligibility criteria for BSC agricultural,

• Candidate must be 10+2 with 50 to 60% from recognised board
• Must be atleast 22 years
• Required subjects are PCB

If you are eligible considering above criteria then move ahead for it.
.
Remember:Hard work pays.
Best of luck