agridat (version 1.16)

chinloy.fractionalfactorial: Sugarcane fractional factorial 1/3 3^5

Description

Sugarcane fractional factorial 1/3 3^5.

Usage

data("chinloy.fractionalfactorial")

Format

A data frame with 81 observations on the following 10 variables.

yield

yield

block

block

row

row position

col

column position

trt

treatment code

N

nitrogen treatment: 0, 1, 2

P

phosphorous treatment: 0, 1, 2

K

potassium treatment: 0, 1, 2

B

bagasse treatment: 0, 1, 2

F

filter press mud treatment: 0, 1, 2

Details

An experiment grown in 1949 at the Worthy Park Estate in Jamaica.

Nitrogen was applied as sulphate of ammonia at 0, 3, 6 hundred-weight per acre.

Phosphorous was applied as superphosphate at 0, 4, 8 hundred-weight per acre.

Potassium was applied as muriate of potash at 0, 1, 2 hundred-weight per acre.

Bagasse applied pre-plant at 0, 20, 40 tons per acre.

Filter press mud applied pre-plant at 0, 10, 20 tons per acre.

Each plot was 18 yards long by 6 yards (3 rows) wide. Plots were arranged in nine columns of nine, a 2-yard space separating plots along the rows and two guard rows separating plots across the rows.

Field width: 6 yards * 9 plots + 4 yards * 8 gaps = 86 yards

Field length: 18 yards * 9 plots + 2 yards * 8 gaps = 178 yards

References

None

Examples

# NOT RUN {
data(chinloy.fractionalfactorial)
dat <- chinloy.fractionalfactorial

# Treatments are coded with levels 0,1,2. Make sure they are factors
dat <- transform(dat,
                 N=factor(N), P=factor(P), K=factor(K), B=factor(B), F=factor(F))

# Experiment layout
if(require(desplot)){
  desplot(yield ~ col*row, dat, out1=block, text=trt, shorten="no", cex=0.6,
          aspect=178/86,
          main="chinloy.fractionalfactorial")
}

# Main effect and some two-way interactions. These match Chinloy table 6.
# Not sure how to code terms like P^2K=B^2F
m1 <- aov(yield ~ block + N + P + K + B + F + N:P + N:K + N:B + N:F, dat)
anova(m1)

# }