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A method of estimating the underlying input–output relations for beef cattle from large-scale experimental trials

Published online by Cambridge University Press:  27 March 2009

D. M. G. Newbery
D. M. G. Newbery
Affiliation:
Faculty of Economics and Churchill College, Cambridge, England
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Summary

The Agricultural Research Council's system of feed evaluation provides a method of predicting the most profitable ration composition, given information about available feedingstuffs and the values of the parameters in the beef-feed production functions. Because these functions are non-linear, parametric estimation based on average data for a group of animals will give biased results. A method of determining unbiased estimators of the parameters is derived and the magnitude of the bias is shown to be small. Some simplifications of the ARC formulae are proposed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 82 , Issue 1 , February 1974 , pp. 1 - 10
Copyright
Copyright © Cambridge University Press 1974

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References

REFERENCES

A. R. C. (1965). The Nutrient Requirements of Farm Livestock, No. 2. Ruminants. Agricultural Research Council, London, England.Google Scholar
Blaxter, K. L. (1968). The effect of the dietary energy Supply on growth. In Growth and Development of Mammals, p. 329 (ed. Lodge, G. A. & Lamming, G. E.). Univ. of Nott. 14th Easter School in Agric. Sci. London: Butterworths.Google Scholar
Burroughs, W., Fowler, M. A. & Adeyanju, S. A. (1970). Not energy evaluation for beef eattle rations compared with evaluation by metabolizable energy measurements. Journal of Animal Science 30, 450–4.CrossRefGoogle Scholar
Crampton, E. W. & Harris, L. E. (1969). Applied Animal Nutrition (second edition). San Francisco: E. H. Freeman and Co.Google Scholar
Newbery, D. M. G. (1972). A Feasibility Study of Intensive Cattle Feeding (mimeo). Churehill College, Cambridge, 06 1972.Google Scholar
Kenya Beef Industry Development Project (UNDP/FAO) (1971). Review of the results of intensive beef feeding trials using maize grain, 11 1970–August 1971. Beef Research Station, Nakuru, Kenya, October 1971.Google Scholar
Rogerson, A. (1970). Food intake and energy utilization by cattle. East African Agricultural and Forestry Journal 34, 195–99.CrossRefGoogle Scholar
Rogerson, A. & Ledger, H. P. (1970). The effects of hexoestrol implantation on carcass analysis, energy balance and nitrogen retention of cattle. East African Agricultural and Forestry Journal 34, 177–81.CrossRefGoogle Scholar
Rogerson, A., Ledger, H. P. & Freeman, G. H. (1968). Food intake and live weight gain comparisons of Bos indicus and Bos taunts steers on a high plane of nutrition. Animal Production 10, 373–80.Google Scholar