Procedure for claiming registration of bowell-fencing from brother

My father having 8 acers of land and he died on 2008 sep and after that that land was transfered to my mothers name. After my fathers death 6 Lakhs loan was there, and my elder brother was not ready to pay the amount at that time so i taken responsibility and cleared the loan and spent some more money on the agriculture land and later after 8 years my brother came and asked my mother that he want half of the land on his name, imeediately i said i invested lot of money on this field please give half of the money to me then he agreed on that.When i went out side of INDIA for some work then he immeidiately did registration of land and occupied my borewells land fnecings etc... and now he was saying that i dont want to give singe rupee to you...do what ever you want.... So please guide me how to proceed further...