agridat (version 1.12)

denis.ryegrass: Plant strength of perennial ryegrass in France

Description

Plant strength of perennial ryegrass in France for 21 genotypes at 7 locations.

Format

A data frame with 147 observations on the following 3 variables.

gen

Genotype factor, 21 levels

loc

Location factor, 7 levels

strength

Average plant strength * 100

Details

INRA conducted a breeding trial in western France with 21 genotypes at 7 locations. The observed data is 'strength' averaged over 7-10 plants per plot and three plots per location (after adjusting for blocking effects). Each plant was scored on a scale 0-9.

The original data had a value of 86.0 for genotype G1 at location L4--this was replaced by an additive estimated value of 361.2 as in Gower and Hand (1996).

References

Gower, J.C. and Hand, D.J., 1996. Biplots. Chapman and Hall.

Examples

# NOT RUN {
data(denis.ryegrass)
dat <- denis.ryegrass
anova(aov(strength ~ gen + loc, dat))

# }