Neb. Rev. Stat. § 57-230: Mineral interests; severed; abandoned; judgment.

If the court shall find that the severed mineral interest has been abandoned, it shall enter judgment terminating and extinguishing it, canceling it of record, and vesting the title thereto in the owner or owners of the interest in the surface from which it was originally severed in the proportions in which they own such interest in the surface.