A duly perfected security interest of a lessor in any portion of crops or animals to pay or secure payment of rental of the premises upon which those crops or animals are grown, not to exceed 50 percent of those crops or animals, shall not be subject to the lien created by ORS 87.226 (Agricultural services lien). [1975 c.648 §2; 2003 c.576 §335]POSSESSORY CHATTEL LIENS