Cal. Food & Agric. Code § 59822

A marketing program of production adjustment adopted under Section 59821 shall not authorize any payment for the removal of acreages of trees or vines of any species or variety specified in the marketing program which have, during the three years immediately preceding the date of application, produced an annual yield per acre in excess of the comparably computed average yield from bearing trees or vines of the same species or variety for the state as a whole. Such yields and averages shall be determined by the director from statistical data which is compiled by any state or federal agency or such other data as the director deems to be representative and reliable.