can I get admission in iim Ahmedabad after bsc agriculture in ananad agriculture University, Gujarat
Yes you can apply for CAT and get admission in IIM Ahmedabad. IIM Ahmedabad is the top Institute for MBA and it's cutoff is very high every year.
Since you are from bsc which is a non engineering background, extra points are given by the Institute for maintaining academic diversity. This is an advantage for you.
For more information on criteria for CAT and IIMs you can visit the following link:
Hope this is helpful.