Such a good question to debate about.
Most of the states in this country have different acts to control land ceiling act.
In an average,one shall have a agricultural land holdings of 30standard hectares.
As you know there are lot of loopholes in Indian law which enables any Indian individuals to accumulate land holdings with a mere permission from the state Govt.
There are various exit routes like Trusts,Societies,NGO to go free for unlimited acquirement of lands in this country if necessited as for as Agricultural area is concerned.
West Bengal,Tamilndu,and Kerala are some states to be sincere in regulating this act and ofcourse Politics and politicians are exempted please.