When they shall have determined to proceed with the matter, said board may adjourn such hearing from time to time, not exceeding four (4) weeks in all, and on final hearing may make such changes in the proposed boundaries as they may find proper, and shall make an order on their records describing the lands which they shall have determined to include in said district, and stating that such lands will be organized into an irrigation district if the vote of the electors thereafter to be taken on the proposition shall be favorable to such organization: provided, that any person whose lands are susceptible of irrigation from the same source may, in the discretion of the board, upon application by him, have such lands included in said district.