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A survey of methods of milk production: II. Statistical analysis of bacteriological tests on milk samples

Published online by Cambridge University Press:  27 March 2009

F. B. Leech ,
J. W. Egdell  and
S. B. Thomas
F. B. Leech
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
J. W. Egdell
Affiliation:
The National Agricultural Advisory Service
S. B. Thomas
Affiliation:
The National Agricultural Advisory Service
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Extract

1. The results of a survey of the methods of milk production on a random sample of farms in four counties of England and Wales were used in conjunction with bacteriological and keeping quality tests of the milk produced, to estimate the influence on milk quality of factors in equipment and technique.

2. Of the many factors in technique investigated, only the sterilization of utensils and the cooling of the milk appeared to affect milk quality. The effects of these two factors differed in some degree with the four tests used.

3. Milk samples from machine-milked herds had significantly greater thermoduric colony counts than samples from hand-milked herds. No other factor of equipment showed appreciable association with milk-quality tests.

4. Brief recommendations are made about the conduct of any future field survey of factors affecting bacteriological and keeping quality of milk.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 48 , Issue 2 , December 1956 , pp. 187 - 193
Copyright
Copyright © Cambridge University Press 1956

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References

REFERENCES

Egdell, J. W., Thomas, S. B., Clegg, L. F. L. & Cuthbert, W. A. (1950). Proc. Soc. Appl. Bad. 13, 132.Google Scholar
Leech, F. B., Egdell, J. W., Heskin, P. & Thomas, S. B. (1955). J. Agric. Sci. 46, 78.CrossRefGoogle Scholar
Ministry of Health (1937). Bacteriological tests for graded milk. Memo. 139/Foods. London: H.M.S.O.Google Scholar
Thomas, S. B., Hobson, P. M., Da Vies, J. C., Jones, C. G. & Jones-Evans, E. (1948). Proc. Soc. Appl. Bact. no. 7.Google Scholar
Yates, F. (1953). Sampling Methods for Censuses and Surveys, 2nd ed.London: Charles Griffin & Company, Ltd.Google Scholar