Mo. Rev. Stat. § 266.311

It shall be unlawful for any person to sell, offer for sale or expose for sale any fertilizer for use or consumption in this state which is misbranded. Any fertilizer shall be deemed to be misbranded if it fails to carry the printed statement required under section 266.321, or if the chemical composition of such fertilizer does not meet the guarantee expressed on said statement within allowable tolerances fixed by the fertilizer control board, or if the container for such fertilizer or any statement accompanying the same carries any false or misleading statement, or if false or misleading statements concerning its agricultural value are made on any advertising matter accompanying or associated with such fertilizer.