Agriculture land lease and sale

Any lease beyond 12 months is mandatoraily registerible under the provisions of the Law.  However, in your case, it is not registered.  Utimately, there is lessor-lessee relationship.  You need to give any compensation to the lessee and the cost of the development towards the land may be given.  You are planning to 1/5th of the sale proceeds to the lessee is out of your own wish and will and in case he is not willing to take your offer, you may file a suit in the Court of Law for eviction of lessee. 

I do not know about Tamil Nadu but heard that in some Northern States there is a law that says someting like, that if someone is shown on agricultral land records as doing agriculture on the land for 3 or more consecutive years then he is considered the owner. If some similar law is there in Tamil Nadu and he has got the land records similarly updated in his own name, then you may be facing real trouble. Else if no such written records exist and you are shown on land records as doing agriculture on land every year, why not politely take possession of the land back from the person by saying that you want to do agriculture yourself and then sell the land.

Thanks Gopal for you valauable information