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The effect of block size on the errors of modern cereal experiments

Published online by Cambridge University Press:  27 March 2009

H. D. Patterson  and
G. J. S. Ross
H. D. Patterson
Affiliation:
Rothamsted Experimented Station, Harpenden
G. J. S. Ross
Affiliation:
Rothamsted Experimented Station, Harpenden
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Extract

The errors of 454 cereal experiments organized by the National Institute for Agricultural Botany between 1956 and 1960 are examined in relation to block size. All the experiments used long, narrow plots and were harvested by combine. The most important conclusion is that the gain in efficiency by using small blocks in cereal experiments is as great now as it was before combine-harvesting and long, narrow plots were introduced. An empirical rule is that the variance per plot is roughly proportional to n½, where n is the number of plots per block.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 60 , Issue 2 , April 1963 , pp. 275 - 278
Copyright
Copyright © Cambridge University Press 1963

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References

REFERENCES

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