Buying agriculture land in maharastra by using old 7 12 of father

To purchase agricultural land in Maharashtra, you need to be an agriculturist, meaning someone who cultivates the land personally or is a family member of an agriculturist. 

If your father's name appears on the 7/12 extract (a land record document), indicating he owns or cultivates agricultural land, this can be used as evidence of your eligibility to purchase agricultural land, as you are considered a son/daughter of a farmer. 

You might need to obtain a farmer certificate to prove your agriculturist status, which can be obtained by producing your father's 7/12 extract and other relevant documents.

Before that you may have to secure the land revenue records on your father's name.