As you haven't mentioned any particular state, here are some of the top ABM Colleges in India,
- Indian institute of management, Ahmadabad, Lucknow
- University of petroleum, Dehradun
- Banaras Hindu university,varanasi
- Doon business school, Dehradun
- Symbiosis institute of international business, Pune
- Chandigarh University
- Integral university, Lucknow
- Aligarh Muslim university
Yes there are very good colleges in India which offers Agriculture Business Management Course.
Every college either takes admission through the CAT or other management entrance exams like XAT,GMAT, NMAT etc.
The top colleges which offers this course are:-
3-Institute of Management Studies,BHU,VARANASI
5-Doon Business School,Dehradun
for the further details like entrance exams,fees,cutoffs,campus,infrastructure you can go to the below given link:-
Hope this will help,Please feel free to ask if you have any further queries.