Wheat, in addition to being a basic food, is one of the great export crops of American agriculture and its production for domestic consumption and for export is necessary to the maintenance of a sound national economy and to the general welfare. The movement of wheat from producer to consumer, in the form of the commodity or any of the products thereof, is preponderantly in interstate and foreign commerce. Unreasonably low prices of wheat to producers impair their purchasing power for nonagriculture products and place them in a position of serious disparity with other industrial groups. The conditions affecting the production of wheat are such that without Federal assistance, producers cannot effectively prevent disastrously low prices for wheat. It is necessary, in order to assist wheat producers in obtaining fair prices, to regulate the price of wheat used for domestic food and for exports in the manner provided in this part.