No later than 20 days after a city or county enters into a contract with a landowner pursuant to this chapter, the clerk of the board or council, as the case may be, shall record with the county recorder a copy of the contract, which shall describe the land subject thereto, together with a reference to the map showing the location of the agricultural preserve in which the property lies. From and after the time of such recordation such contract shall impart such notice thereof to all persons as is afforded by the recording laws of this state.