Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2025-01-03T19:04:57.399Z Has data issue: false hasContentIssue false
  • English
  • Français

The value of covariance in analysing field experimental data

Published online by Cambridge University Press:  27 March 2009

F. H. Garner ,
J. Grantham  and
H. G. Sanders
F. H. Garner
Affiliation:
(School of Agriculture, Cambridge.)
J. Grantham
Affiliation:
(School of Agriculture, Cambridge.)
H. G. Sanders
Affiliation:
(School of Agriculture, Cambridge.)
Get access Rights & Permissions [Opens in a new window]

Extract

It is suggested that the covariance method of statistical analysis is of considerable value in correcting for uncontrolled inequalities arising early in an experiment, and in analysing the effects of developmental factors on yield. As an example its application to the results of an experiment with beans is described.

It is with great pleasure that the writers acknowledge their indebtedness to Dr J. Wishart for his helpful criticism throughout the work.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 24 , Issue 2 , April 1934 , pp. 250 - 259
Copyright
Copyright © Cambridge University Press 1934

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1)Cheesmann, E. E. and Pound, F. J.Uniformity trials on cacao. Trop. Agric. (1932), 9, 277.Google Scholar
(2)Eden, T.Studies in the yield of tea. I. The experimental errors of field experiments with tea. J. Agric. Sci. (1931), 21, 547.CrossRefGoogle Scholar
(3)Fisher, R. A.Statistical Methods for Research Workers (1932). Section 49–1, Fourth edition, Edinburgh.Google Scholar
(4)Immer, F. R. (a) A study of sampling technic with sugar beets. (b) Size and shape of plots in relation to field experiments with sugar beets. J. Agric. Res. (1932), 44, 633 and 649.Google Scholar
(5)Murray, R. K. S.The value of a uniformity trial in field experimentation with rubber. J. Agric. Sci. (1934), 24, 177.CrossRefGoogle Scholar
(6)Sanders, H. G.A note on the value of uniformity trails for subsequent experiments. J. Agric. Sci. (1930), 20, 63.CrossRefGoogle Scholar