Abstract
BAIRD and Greene (1935) found that growing turkeys require between 60 and 70 A.O.A.C. chick units of vitamin D per 100 grams of feed. In the United States Department of Agriculture Yearbook, Titus (1939) has suggested that 80 A.O.A.C. chick units is probably optimum for young growing turkeys. More recently, Jukes and Sanford (1939) concluded that 200 A.O.A.C. chick units per 100 grams of feed is required.The experiment reported here was conducted for the purpose of gaining information on the vitamin D requirements of poults when reference cod liver oil, fortified cod liver oil, and activated animal provitamin D are used as sources of vitamin D.MATERIALS AND METHODSDay-old, small-type turkey poults of mixed breeding were distributed at random into 12 lots of 16 each. Each lot of poults was placed in a heated compartment of a battery brooder in a room from which all daylight was excluded .
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