agridat (version 1.18)

bancroft.peanut.uniformity: Uniformity trial of peanuts

Description

Uniformity trial of peanuts in Alabama, 1946.

Usage

data("bancroft.peanut.uniformity")

Format

A data frame with 216 observations on the following 5 variables.

row

row

col

column

yield

yield, pounds

block

block

Details

The data are obtained from two parts of the same field, located at Wiregrass Substation, Headland, Alabama, USA. Each part had 18 rows, 3 feet wide, 100 feet long. Plots were harvested in 1946. Green weights in pounds were recorded.

Each plot was 16.66 linear feet of row and 3 feet in width, 50 sq feet.

Field width: 6 plots * 16.66 feet = 100 feet

Field length: 18 plots * 3 feet = 54 feet

Conclusions: Based on the relative efficiencies, increasing the size of the plot along the row is better than across the row. Narrow, rectangular plots are more efficient.

References

None

Examples

# NOT RUN {
library(agridat)
data(bancroft.peanut.uniformity)
dat <- bancroft.peanut.uniformity
  
# match means Bancroft page 3
## dat <!-- %>% group_by(block) %>% summarize(mn=mean(yield)) -->
## # A tibble: 2 x 2
##   block    mn
##   <chr> <dbl>
## 1 B1     2.46
## 2 B2     2.05
  
libs(desplot)
desplot(dat, yield ~ col*row|block,
        flip=TRUE, aspect=(18*3)/(6*16.66), # true aspect
        main="bancroft.peanut.uniformity")

# }