These data are yields in bushels per acre, of 10 varieties of barley
grown in 1/40 acre plots at University Farm, St. Paul, and at the five
branch experiment stations located at Waseca, Morris, Crookston, Grand
Rapids, and Duluth (all in Minnesota). The varieties were grown in
three randomized blocks at each of the six stations during 1931 and
1932, different land being used each year of the test.
Immer et al. (1934) present the data for each Year*Site*Variety*Block.
The data here is the average yield across the three blocks.
Immer et al. (1934) refer (once) to the experiment as being conducted
in 1930 and 1931, then later refer to it (repeatedly) as being
conducted in 1931 and 1932. Later authors have continued the
confusion.
Cleveland (1993) suggests that the data for the Morris site may have
had the years switched.