Multi-environment split-plot experiments
Published at September 13, 2022 · 7 min read
Have you made a split-plot field experiment? Have you repeated such an experiment in two (or more) years/locations? Have you run into troubles, because the reviewer told you that your ANOVA model was invalid? If so, please, stop for awhile and read: this post might help you understand what was wrong with your analyses.
Motivating example
Let’s think of a field experiment, where 6 genotypes of faba bean were compared under two different sowing times (autumn and spring). For the ease of organisation, such an experiment was laid down as a split-plot, in a randomised complete block design; sowing times were randomly allocated to main-plots, while genotypes were randomly allocated to sub-plots. Let’s stop for a moment… does this sound strange to you? Do you need further information about split-plot designs? You can get some general information at this link and hints on how to analyse the results at this other link
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