Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S
and S-PLUS, Springer, New York. (Appendix A.15)
Venables, W. N. and Ripley, B. D. (2002) Modern Applied
Statistics with S. (4th ed), Springer, New York.
Details
These data have been introduced by Yates (1935) as an example of a
split-plot design. The treatment structure used in the experiment was
a $3 \times 4$ full factorial, with three varieties of oats
and four concentrations of nitrogen. The experimental units were
arranged into six blocks, each with three whole-plots subdivided into
four subplots. The varieties of oats were assigned randomly to the
whole-plots and the concentrations of nitrogen to the subplots. All
four concentrations of nitrogen were used on each whole-plot.