Experimentation on a plot of land is shown in Figure 5. Suppose that we are considering
two factors (A and B) and each has three levels, requiring nine treatments in total. If a
completely randomised design is used, all nine treatments are randomly assigned to nine
subplots of land. If the split plot arrangement is used, factor A is used as a whole plot
factor, and its three levels are randomly assigned on three plots of land with levels of
factor B randomly assigned within each subplot. In split block, three levels of both factorA (A1, A2, and A3) and B (B1, B2, and B3) are randomly assigned across the land.
Experimentation on a plot of land is shown in Figure 5. Suppose that we are consideringtwo factors (A and B) and each has three levels, requiring nine treatments in total. If acompletely randomised design is used, all nine treatments are randomly assigned to ninesubplots of land. If the split plot arrangement is used, factor A is used as a whole plotfactor, and its three levels are randomly assigned on three plots of land with levels offactor B randomly assigned within each subplot. In split block, three levels of both factorA (A1, A2, and A3) and B (B1, B2, and B3) are randomly assigned across the land.
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