1.If you are sure that your portion of the land has been usurped by your Uncle by erecting a fence covering your said portion of the land t hen the right procedure is to file a declaratory suit against your uncle praying for a declaration that your portion of the land has been fenced by your uncle and for passing order the Court will call for report from BLRO who will engage the approved Amin/Surveyor to measure the land.
2. The above suit will take atleast 2 to 4 years to be disposed of.
3. If you want to avoid court cases and also are confident that you have the capacity to handle the after effect of removing the fence to recover your land then it can be done very swiftly and the fense is to be put again covering the land of your Uncle only after recovering your land.
4. You should also lodge a police complaint thereafter alleging that your uncle is trying to usurp your land on hearing that you are planning to sell the same.
5. Thereafter you can sell your land as per law.