Notwithstanding any other provision of this chapter, the Secretary shall increase the acreage allotments for the 1970 and subsequent crops of wheat for privately owned farms in the irrigable portion of the area known as the Tulelake division of the Klamath project of California located in Modoc and Siskiyou Counties, California, as defined by the United States Department of the Interior, Bureau of Reclamation, and hereinafter referred to as the area. The increase for the area for each such crop shall be determined by adding, to the extent applications are made therefor, to the total allotments established for privately owned farms in the area for the particular crop without regard to this subsection (hereinafter referred to as the original allotments) an acreage sufficient to make available for each such crop a total allotment of twelve thousand acres for the area. The additional allotments made available by this subsection shall be in addition to the National, State, and county allotments otherwise established under this section, and the acreage planted to wheat pursuant to such increases in allotments shall not be taken into account in establishing future State, county, and farm acreage allotments except as may be desirable in providing increases in allotments for subsequent years under this subsection for the production of Durum wheat. The Secretary shall apportion the additional allotment acreage made available under this subsection between Modoc and Siskiyou Counties on the basis of the relative needs for additional allotments for the portion of the area in each county. The Secretary shall allot such additional acreage to individual farms in the area for which applications for increased acreages are made on the basis of tillable acres, crop rotation practices, type of soil and topography, and the original allotment for the farm, if any. The increase in the wheat acreage allotment for any farm under this subsection (1) shall not be taken into account in computing the farm wheat marketing allocation under section
1379b of this title, and (2) shall be conditioned upon the production of Durum wheat on the original allotment and on the increased acreage. The producers on a farm receiving an increased allotment under this subsection shall not be eligible for diversion payments under section
1339 of this title.