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Size and Shape of Plots for Estimating Yield Losses from Cereal Foliage Diseases

Published online by Cambridge University Press:  03 October 2008

W. C. James  and
C. S. Shih
W. C. James
Affiliation:
Research Branch, Canada Department of Agriculture, Ottawa
C. S. Shih
Affiliation:
Research Branch, Canada Department of Agriculture, Ottawa
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Summary

Data from uniformity trials on healthy and diseased wheat and oat crops showed that the coefficient of variation for yield decreased as plot size increased and became nearer to square in shape. Infection with Septoria leaf blotch of oats and powdery mildew of wheat did not appear to affect yield variability. Plots larger than rod row size (where 16 ft of the centre row of 3 rows is harvested) are recommended to detect differences of 10 per cent in yield between two treatments.

Type
Research Article
Information
Experimental Agriculture , Volume 9 , Issue 1 , January 1973 , pp. 63 - 71
Copyright
Copyright © Cambridge University Press 1973

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