Hoshmand (2006) described a split plot design to test grain yield of corn with respect to corn hybrids (split plots) and nitrogen (in whole plots). The experiment was replicated at two blocks.
data(corn)
A data frame with 40 observations on the following 4 variables.
yield
Corn yield in bushels per acre.
hybrid
Type of hybrid, P = pioneer, levels were: A632xLH38
LH74xLH51
Mo17xA634
P3732
P3747
.
N
Nitrogen addition in lbs/acre 0
70
140
210
.
block
A blocking factor with levels 1
2
.