Starting on the date a producer delivers grain, hay, or straw to a preparer, the producer has a first priority statutory lien, referred to as a "preparer lien." This preparer lien shall continue twenty days after payment for the product is due and remains unpaid, without filing any notice of lien, for the contract price, if any, or the fair market value of the products delivered. The preparer lien attaches to the agricultural products delivered by the producer to the preparer, and to the preparer's accounts receivable.