; or (B) the yield determined under subsection (b)(1) or (c)(2) is an unrepresentative average yield for the county, as determined by the Secretary; (4) in the case of individual coverage, assign an average yield for a farm on the basis of the yield history of representative farms in the State, region, or crop reporting district, as determined by the Secretary, if the Secretary determines that the farm has planted acreage in a quantity that is insufficient to calculate a representative average yield for the farm; (5) prioritize the use of yields from sources that provide the greatest geographic coverage of county-level data from the same source; and (6) (A) use the yield, benchmark revenue and payment rate based on the county of the physical location of the farm; and (B) in the case of a farm that crosses county boundaries— (i) split the base acres on a pro rata basis based on the relative quantity of cropland in each county; and (ii) calculate any payments on that same pro rata basis. 9. Producer agreements (a) Compliance with certain requirements (1) Requirements Before the producers on a farm may receive payments under this Act with respect to the farm, the producers shall agree, during the crop year for which the payments are made and in exchange for the payments— (A) to comply with applicable conservation requirements under subtitle B of title XII of the Food Security Act of 1985 ( 16 U.S.C. 3811 et seq.); (B) to comply with applicable wetland protection requirements under subtitle C of title XII of that Act ( 16 U.S.C. 3821 et seq.); (C) to effectively control noxious weeds and otherwise maintain the land in accordance with sound agricultural practices, as determined by the Secretary