The appraiser from actual view and inspection or from statistical methods prescribed by the director of property valuation, from consultation with the owner or agent thereof if expedient and from such other sources of information as are within the appraiser’s reach, shall determine as nearly as is practicable the fair market value in money of all taxable real property within the county and assess the same as required in Kan. Stat. Ann. § 79-1439, and amendments thereto.