Dear Nanda,
I would like to answer your query that you want to know course after BSc agriculture.
As you have done BSc in Agriculture you move forward with Post-graduation in Agriculture.
MSc in Agriculture is an appropriate course after BSc in Agriculture.  Later you can study further with MPhill and PhD.
But you if want you want do jobs you can apply for Agriculture development officer/ agriculture extension officer/ Range forest officer/ agriculture officer.

I hope you take your interest further.

All the best.