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Recent developments in the design of field experiments. IV. Lattice squares with split plots

Published online by Cambridge University Press:  27 March 2009

O. Kempthorne
O. Kempthorne
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
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Extract

The testing of a large number of varieties or treatments can generally be most conveniently made by the use of the quasi-factorial designs devised by Yates. The value of such designs is enhanced by the possibility of introducing further treatments on parts of the plots. The present paper describes a lattice square trial testing 25 organic treatments (actually 22 different treatments with a control represented three times) in which all combinations of nitrogen, phosphate and potash were also tested by splitting the plots and confounding the three-factor interaction with whole plots, the total number of split-plots being 300. Both the design and analysis are comparatively simple and straight-forward, and will serve as an example of the use of split-plot confounding in most types of quasi-factorial designs.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 37 , Issue 2 , April 1947 , pp. 156 - 162
Copyright
Copyright © Cambridge University Press 1947

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References

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