Property transferred to adopted son by will made in son's name

Religion: Hindu When i was little, my uncle has written will on my name when i was just born because he dont have any son or daughter, after couple of years uncle adoped me and my name comes with my uncle name. Now he is died. How does propery agriculture land comes to my name? Do i need to show will which was prepared? Or by death certificate propery will be transferred to my name. We dont have good relations with my uncle’s another brother who has made the will. Also he was witness on will. Can he temper with legal process of transfer?