A.S. Series 77-18
The objective of these experiments was to evaluate the biological potency of two sources of vitamin A premix differing in freshness when administered to fattening beef cattle. Chemical assays were compared with blood and liver vitamin A content to measure the biopotency of the vitamin.
Number of Pages
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Luther, R. M.; Embry, L. B.; and Bush, L. F., "Vitamin A Bioptency as Measured by Stores of Vitamin A in Livers of Feedlot Cattle" (1977). South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1977. 9.