Suggest college for MBA agribusiness

It's good to know that you have completed BSc in agriculture.

Basically, Agribusiness deals with a business that supplies farm inputs, such as farm machinery and seed supply. There are several colleges where you can do this course. Few of the institutes are listed below:

1. IIM Lucknow, Ahmedabad.
2. Aligarh Muslim University.
3. Banaras Hindu University.
4. Symbiosis, Pune.
5. Chandigarh University.
6. Jaipur University

Apart from these, there are lots of colleges where you can pursue this course but most of the premium institute take admissions through CAT. So you should qualify it.

I doubt if Indian Institute of health management and research has agribusiness course.

I am not finding the confirmatory information regarding the availability of MBA Agribusiness course in Jaipur in the two institutions mentioned by you. But there is one institution in Jaipur which offers 2 years MBA course in Agribusiness and one other which offers 2 years Post Graduate Diploma in Agribusiness.
1. MJRP College of Corporate Management, Jaipur - for MBA in Agribusiness.
2. Chaudhary Charan Singh National Institute of Agricultural Marketing (NIAM), Jaipur - for PGDM in Agribusiness.
If you have interest in such colleges outside Jaipur then there are many options in our country.

Indian Institute of Health Management is offering an MBA in rural management but there is no specific course like MBA Agribusiness as far as my knowledge goes.
Institute of Rural Management, Jaipur is having a PG Diploma in Rural Management. But there is no mention of this course on their site. You have to better contact them by sending a mail and get the information.
The following Institutes are offering the course mentioned by you.
1. Suresh Gyan Vihar University, Jaipur
2. KIIT School Of Rural Management, Bhubaneswar
3. Symbiosis Institute of International Business, Hinjewadi, Pune.
4. Indian Institute of Management (IIML), Lucknow.
There are many other institutes. You can try any of these colleges. The admission will be based on CAT rank. The fee structure will vary and may start from 10 Lakhs.