Abstract
The desire to establish an ‘exchange rate’ between different animal feeds is not new. It has existed since animal production became a commercial occupation, indeed since animals first served man’s need for cultivation and transport. Tyler (1975) gave a brilliant account of its history, with numerous references extending back to observations on the value of different feeds as early as 2500 BC. Flatt (1988) also summarized many historical aspects of feed evaluation. There is therefore no need for an elaborate account here.
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© 1990 Elsevier Science Publishers Ltd
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Ryle, M., Ørskov, E.R. (1990). Feed Evaluation, Past and Present. In: Energy Nutrition in Ruminants. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0751-5_9
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DOI: https://doi.org/10.1007/978-94-009-0751-5_9
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