On or before the first Monday in March of each year the assessor shall prepare and certify an assessment roll of all property in the city subject to taxation. Such roll shall be prepared in accordance with statute and this charter. Values shall be estimated according to recognized methods of systematic assessment as determined by statute and decisions of the State Tax Commission. The records of the assessor shall show separate figures for the value of the land, of the building improvements and of personal property; and the method of estimating all such values shall be as nearly uniform as possible.