Handbook of official grain standards of United States, standards for wheat, effective Oct. 1, 1937, corn, effective Jan. 20, 1937, barley, effective July 1, 1937, oats effective June 1, 1947, feed oats and mixed feed oats, effective July 1, 1935, rye, effective July 1, 1941, grain sorghums and flax-seed, effective July 1, 1935, soybeans, effective Sept. 1, 1949 and mixed grain, effective July 1, 1935, important features of grain inspection.

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