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U. S. Plant, Soil, and Nutrition Laboratory, Agricultural Research Administration, Ithaca, New York
The manganese requirement of rabbits has been studied by feeding a basal diet low in manganese supplemented with various levels of manganese. Insofar as bone development is concerned, it appears that 0.3 mg of manganese per rabbit per day is sufficient to meet normal requirements. The minimum manganese intake necessary for maximum growth requires more study, but it appears to be higher than the amount required for normal bone development.