Dear Rahul,
I would like to tell you that there are many colleges in India which offers Agribusiness management.
The following colleges/University are among the top colleges/University which offers Agribusiness management in India
Indian Institute of Management Ahmedabad
School of Business, University of Petroleum and Energy Studies, Dehradun
Institute of Management Studies, Banaras Hindu University, Varanasi
Indian Institute of Management Lucknow
Symbiosis Institute of International Business, Pune
Chandigarh University, Chandigarh
National Institute of Agricultural Extension Management, Hyderabad

For more information you can check out their website.

i hope this information helps you

All the best