Oregon Revised Statutes Agricultural Marketing and Warehousing § 576.705

(1) In the absence of a contract providing otherwise, any processor who purchases a commodity from a producer shall make full payment therefor not later than the 30th day after the day the processor takes delivery of the harvested commodity.

(2) Any processor who fails to make payment as required by subsection (1) of this section shall pay, in addition to the amount due, interest thereon at the rate of one percent per month.