Nebraska Revised Statute 77-1347
Agricultural or horticultural lands; special valuation; disqualification.
Upon approval of an application, the county assessor shall value the land as provided in section 77-1344 until the land becomes disqualified for such valuation by:
(1) Written notification by the applicant or his or her successor in interest to the county assessor to remove such special valuation;
(2) Except as provided in subsection (2) of section 77-1344, inclusion of the land within the corporate boundaries of any sanitary and improvement district, city, or village;
(3) The land no longer qualifying as agricultural or horticultural land; or
(4) For land that consists of five contiguous acres or less, the owner or lessee of the land not being able to provide an Internal Revenue Service Schedule F documenting a profit or loss from farming for two out of the last three years.