Agricultural land

Hi I am an NRI and i would like to come back to India (karnataka state) and get into agriculture. For this I would like to buy some purely agricultural land. I am hearing that income should not be greater than 2lacs p.a to buy an agricultural land. Being an NRI, i have not payed income tax for the past 10 years and neither filed tax returns. Is there any legal hurdles in here? Waiting for your expert advice. Regards Prasanna