Farmer certificate or getback land

My Maternal Grandfather was get the Land from the Gujarat goverment and land was the Agriculture. the land was got on 1977 for lease 30 years as new rule land for grow fruits. but we grow the peanuts, wheats, etc. but later when goverment check the registry they taken back the land and land goes to sri sarkar(Khalsa) in 1993. So, I want to know what's the process for the 1) Farmer certificate 2)Take back Land from goverment.