Agricultural land requirement in Karnataka

Dear All,

My father in law has totally 40 cents (15 Guntas) are available and registered 3 years back as former with all clear tittles in Kerala.

Now can anyone advise is it possible to purchase any land in Karnataka with same pani holding in Kerala.

and looking to purchase 1 acre land in rural areas of Karnataka, ( Banavara, Birur, Tarikere, Lingadahalli or Gajnur).

Please advice me on this?

what are the documents required to purchase the land.