Daily weight gains of sheep in pure sward grazing trials showed relative feeding values to be in the order: white clover (100) > sainfoin (97), Maku lotus (87) > lucerne, red clover (78) > perennial ryegrass (52). The high feeding value of lotus and sainfoin may be due to the presence of condensed tannins which have been shown to improve protein digestion and utilization in indoor feeding trials.
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John et al. (1981) studied this question.
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