Hello Gopal,

The eligibility for the BSc agriculture is to have 50% and above.
As you are able to get 70%then you can have decent chances for admission to bsc agriculture.
However you should have a percentage of above 85% to get admitted to top bsc agriculture colleges.
But you can still try in many colleges which give seat Based on merit.
If you belong to the reserved categories you may have better chances than general category.
I hope this helps.

Regards