There are some universities/colleges in India which offers PGDM course in Agriculture business management.
- IIM Lucknow - Indian Institute of Management (IIML)
- National Institute of Agricultural Extension Management
- MITCON Institute of Management, pune
- Indian Institute of Plantation Management, Banglore
- Vishwa Vishwani Institute of Systems and Management - VVISM
These are some colleges/ Universities has PGDM in Agriculture business management.
I would suggest you to check out MBA in Agriculture business.
i hope this information helps you
all the best