Studies were made on maintenance and milk production of ewes and growth of lambs fed rations containing non-leguminous roughage (oat straw) supplemented with protein, vitamin A and alfalfa hay ash. An unsupplemented oats straw ration and an alfalfa hay ration were fed as controls. The results of this experiment based on milk production of the ewes and growth of lambs, indicate that the non-leguminous ration of corn, corn silage, and oat straw was deficient in protein and probably also in vitamin A.
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Shrewsbury et al. (1942) studied this question.