Neb. Rev. Stat. §§ 46-176
The board of directors, at the time or times to which the hearing of such petition may be adjourned, shall proceed to hear the petition and all objections thereto, presented in writing by the persons, showing cause as aforesaid, why the prayer of such petition should not be granted. The failure of any person interested in the district to show cause in writing why the tract or tracts of land mentioned in the petition should not be excluded from such district shall be deemed and taken as an assent by him to the exclusion of such tract or tracts of land, or any part thereof, from the district; and the filing of such petition with such board, as aforesaid, shall be deemed and taken as an assent by each and all of such petitioners to the exclusion from such district of the lands mentioned in the petition, or any part thereof; Provided, in no case shall any land be held by any district or taxed for irrigation purposes which cannot from any natural cause be irrigated thereby.
Neb. Rev. Stat. §§ 46-176