Cotton certificate plan. Hearing before a subcommittee of the Committee on agriculture and forestry, United States Senate, Seventy-sixth Congress, third session, on S. 2434, a bill to amend the Agricultural adjustment act of 1938, as amended, for the purpose of regulationg interstate and foreign commerce in cotton, providing for the orderly marketing of cotton at fair prices in interstate and foreign commerce, insuring to cotton producers a parity income from cotton based upon parity price or cost of production, whichever is higher, and for other purposes. April 12, 1940.