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Edge and neighbour effects in cereal yield trials

Published online by Cambridge University Press:  27 March 2009

R. B. Austin  and
R. D. Blackwell
R. B. Austin
Affiliation:
Plant Breeding Institute, Trumpington, Cambridge
R. D. Blackwell
Affiliation:
Plant Breeding Institute, Trumpington, Cambridge
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Summary

In two field experiments with winter wheat varieties, the grain yields per unit area calculated from entire plots 4·2 × 1·18 m were 25% greater than the yields of the centre row. This occurred mainly because the outer rows in the plots yielded 62% more than the centre row. When the yields were calculated on the basis of a plot width of 1·53 m (the distance from path centre to path centre across the long axis of a plot), it was estimated that they were 4% less than the yields of the centre rows. In the most extreme case when a short variety in a plot of this size was bordered by neighbours 70 cm taller, its yield, relative to that of the tall variety, was underestimated by 10–12%.

A separate experiment showed that the greater yield from plants at the edges of plots was associated mainly with more ears.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 94 , Issue 3 , June 1980 , pp. 731 - 734
Copyright
Copyright © Cambridge University Press 1980

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References

Austin, R. B., Bingham, J., Blackwell, R. D., Evans, L. T., Ford, M. A., Morgan, C. L. & Taylor, M. (1980). Genetic improvements in winter wheat yields since 1900 and associated physiological changes. Journal of Agricultural Science, Cambridge 94, 675–689.Google Scholar
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