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A Method of Estimating the Yield of a Missing Plot in Field Experimental Work

Published online by Cambridge University Press:  27 March 2009

F. E. Allan  and
J. Wishart
F. E. Allan
Affiliation:
(Statistical Department, Rothamsted Experimental Station, Harpenden.)
J. Wishart
Affiliation:
(Statistical Department, Rothamsted Experimental Station, Harpenden.)
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Extract

In cases of field experiments when one plot is missing, a method has been developed for furnishing an estimate of the yield of the missing plot, based on all the other values. The calculation is given for (a) a Randomised Block experiment, and (b) a Latin Square arrangement. In both cases the actual arithmetic is very simple.

The steps in the procedure are:

(1) Determine the desired value by an application of the equation (A) or (B) according as the experiment was arranged in Randomised Blocks or in a Latin Square.

(2) Proceed as usual with the analysis of variance, using the estimated figure for the missing yield, and remembering to deduct one from the number of degrees of freedom ascribable to error.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 20 , Issue 3 , July 1930 , pp. 399 - 406
Copyright
Copyright © Cambridge University Press 1930

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References

1 See Wishart and Hines, “Fertiliser Trials on the Ordinary Farm,” J. Min. Agric., Sept. 1929, pp. 524–32.

page 405 note 1 See Wishart and Hines, loc. cit.