agridat (version 1.27)

cargneluttifilho.chickpea.uniformity: Uniformity trial of chickpea in Brazil

Description

Uniformity trial of chickpea in Brazil, three trials.

Usage

data("cargneluttifilho.chickpea.uniformity")

Format

A data frame with 108 observations on the following 4 variables.

trial

trial name, T1/T2/T3

row

row ordinate

col

column ordinate

yield

aerial mass per plot, in grams

Details

Three uniformity trials of chickpea, each with a 6 x 6 grid of basic units, 1m x 1m each, used to determine optimum plot size for evaluating shoot (above-ground) mass.

Experiment conducted at Federal University of Santa Maria, Brazil. The plots were harvested in Dec 2022, 142 days after sowing (90 percent of the pods mature).

Field width: 6 columns x 1m = 6 m

Field length: 6 rows x 1m = 6 m

Data provenance: Data were extracted from the source publication.

References

None

Examples

if (FALSE) {
  library(agridat)
  data(cargneluttifilho.chickpea.uniformity)
  dat <- cargneluttifilho.chickpea.uniformity

  library(dplyr) # Match source paper, table 1
  dat |> group_by(trial) |> summarize(mn=mean(yield), cv=sd(yield)/mean(yield))

  library(desplot)
  desplot(dat, yield ~ col*row|trial,
          flip=TRUE, tick=TRUE, aspect=1,
          main="cargneluttifilho.chickpea.uniformity")
}