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Three studies involving 450 spent S.C.W.L. individually caged hens were conducted during the winter months. It was found that feeding six different levels of ascorbic acid at different time intervals from three days to four weeks had no significant effect on tibia breaking strength, serum calcium, egg production or percent tibia ash. There was a trend for a numerical decrease in tibia breaking strength when hens fed ascorbic acid were compared to controls. A statistical difference was noted between strains when tibia strengths were compared.
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Rowland et al. (1973) studied this question.
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