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The Vitamin a Requirement of the Turkey Poult Fed a Purified Diet^1,2,3,

One Figure

Department of Agricultural Biochemistry, New Jersey Agricultural Experiment Station, Rutgers University, The State University of New Jersey, New Brunswick

When Jersey Buff turkey poults were fed a purified diet containing graded levels of vitamin A, 300 I.U. per 100 gm gave nearly as good growth as 500 I.U. or 600 I.U., but a level of 500 I.U. was necessary to prevent gross external and internal signs of A-avitaminosis. It is recognized that higher levels of vitamin A may be necessary for the prevention of microscopic signs of deficiency.

² This study was made possible by a grant from The Lederle Laboratories Division, American Cyanamid Company, Pearl River, N. Y.

³ Presented before the American Institute of Nutrition, Detroit, Mich., April 18–22, 1949.

⁴ Present address: The Brookhaven National Laboratory, Patchogue, L. I., N. Y.

Manuscript received 18 July 1950.