try Sci. 35: 783-789.

THE nutritional requirements for B-vitamins in the diet of the turkey hen have not been studied extensively. Much of the vitamin information used in formulating turkey breeder diets is based on studies with the laying chicken require-ments for egg production and hatchability, on poult requirements for growth, or upon results with apparently adequate practical rations. Boucher et al. (1941) found that ribo-flavin had no influence on body weight, egg production, fertility or mortality. Hatch-ability dropped to zero when the ration con-tained 155 jig. per 100 gm. ration but reached a maximum as riboflavin reached products in poultry rations. II. Vitamin and amino acid provision for laying hens. J. Agric