Okla. Stat. tit. 42, § 47

A. Any person selling, furnishing, applying or providing to the owner of crops which are growing or to be grown, any seed, chemicals, pesticides, herbicides or fertilizer for the growing of the crops shall, upon filing, have a lien on the crops for the amount due for such seed, chemicals, pesticides, herbicides or fertilizer or for the application thereof. The lien provided for in this section shall be subject to all prior perfected liens. B. The lien created by this section shall not be effective unless filed as an agricultural lien pursuant to Article 9 of the Uniform Commercial Code. C. The lien created by this section may be foreclosed by the sale of the crops subject to the lien anytime within twelve (12) months after filing of the lien in accordance with the provisions of Title 12A of the Oklahoma Statutes.