Wheat Grain and Straw Yield

SUMMARY:

The wheat data frame is a spatial data set listing yields of grain and straw from 500 plots of wheat laid out in 25 x 20 lattice covering approximately 1 acre in total area. The data were collected in 1910 at the Rothamsted Experimental Station in England (Mercer and Hall, 1911).

DATA DESCRIPTION:

The data frame contains the following columns:

ARGUMENTS:

x
the relative x location of the plot. The range of x is 1 to 25.
y
the relative y location of the plot. The range of y is 1 to 20.
grain
the yield of grain for the plot in pounds.
straw
the yield of straw for the plot in pounds.

SOURCE:

The data are from Mercer and Hall (1911).

REFERENCES:

Mercer, W. B. and Hall, A. D. (1911). The experimental error of field trials. Journal Agricultural Science (Cambridge), 4, 107-132.