Such petition shall specify the amount of bonds to be voted and the length of time such bonds shall run, and shall be signed by not less than three-fifths of the owners of land within said district who are qualified electors of the county in which said district is located. The filing of such petition in the office of the county clerk of such county shall be a presentation of the same to said board of county commissioners, and upon the filing of the same the county clerk shall immediately notify the members of said board of county commissioners thereof, and it shall be the duty of said board of county commissioners to meet at their usual place of meeting within ten days after the filing of said petition and consider the same; and if said board shall find that said petition is in due form and signed by not less than three-fifths of the owners of land within said irrigation district who are qualified electors of the county in which said district is located, they shall make an order calling an election in said district to vote upon the proposition to issue said bonds.