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Effect of daylength on feed efficiency. (a) Comparison of broiler gain to feed efficiency ration (mortality corrected) under four daylength photoperiods at three age ranges, with data expressed as a percentage of the maximum value within each age; (b) Comparison of turkey gain to feed efficiency ration (mortality corrected) under four daylength photoperiods at three age ranges, with data expressed as a percentage of the maximum value within each age.
