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Dried potato products for egg production: statistical analysis of a laying experiment

Published online by Cambridge University Press:  27 March 2009

W. Bolton  and
R. W. Hale
W. Bolton
Affiliation:
Ministry of Agriculture for Northern Ireland and theQueen's University of Belfast
R. W. Hale
Affiliation:
Agriculture Research Institute of Northern Ireland and theQueen's University of Belfast
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Extract

An experiment involving twelve pens of twenty-five pullets demonstrated that two types of dried potatoes compared favourably with cereals, as regards their effects on egg production, when up to 42½% of each product was included in the mash.

The records of the experiment, as regards (a) the number of eggs laid in 12 months, (b) the mean weight of eggs during the year, and (c) the change in live weight during the year, were studied by analysis of variance, using the approximate method of Yates (1933) for obtaining standard errors of pen means from the variance within pens. Similar analyses of the number of eggs laid in the month were carried out for each month separately. The latter analyses indicated the months in which increased production was obtained from the superior rations, and showed that duplicate pens had reacted similarly to the experimental feeding. The results of the statistical analyses are set out in some detail as an example of method.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 35 , Issue 3 , July 1945 , pp. 158 - 162
Copyright
Copyright © Cambridge University Press 1945

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References

REFERENCES

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