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The Use of Neighbouring Plot Values in the Analysis of Variety Trials

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  • R. A. Kempton
  • C. W. Howes

Abstract

The method of adjusting plot values by covariance on neighbouring plots is applied to the analysis of plant breeding trials. For cereal trials the method is shown to be very effective in reducing variation caused by spatial heterogeneity within replicates and generally performed about as well as a more conventional row and column lattice square analysis. Results obtained from trials with replicated standards suggest that the reduction in estimate of error variance truly reflects the increased accuracy of the estimates of variety means. The method may be used when plot values are affected by the particular varieties occurring in neighbouring plots, and is effective in adjusting for competition effects in sugar beet trials.

Suggested Citation

  • R. A. Kempton & C. W. Howes, 1981. "The Use of Neighbouring Plot Values in the Analysis of Variety Trials," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 30(1), pages 59-70, March.
  • Handle: RePEc:bla:jorssc:v:30:y:1981:i:1:p:59-70
    DOI: 10.2307/2346657
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    Cited by:

    1. Raegan Hoefler & Pablo González-Barrios & Madhav Bhatta & Jose A. R. Nunes & Ines Berro & Rafael S. Nalin & Alejandra Borges & Eduardo Covarrubias & Luis Diaz-Garcia & Martin Quincke & Lucia Gutierrez, 2020. "Do Spatial Designs Outperform Classic Experimental Designs?," Journal of Agricultural, Biological and Environmental Statistics, Springer;The International Biometric Society;American Statistical Association, vol. 25(4), pages 523-552, December.
    2. Butler, Neil A., 1999. "The efficiency of ordinary least squares in designed experiments subject to spatial or temporal variation," Statistics & Probability Letters, Elsevier, vol. 41(1), pages 73-81, January.

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