agridat (version 1.27)

matusgutierrez.maize.uniformity: Uniformity trial of maize in Nicaragua

Description

Uniformity trial of maize in Nicaragua

Usage

data("matusgutierrez.maize.uniformity")

Format

A data frame with 576 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield per plot, kg

Details

The experiment was located at 12 deg 3 min North, 86 deg 6 min West in Nicaragua. Conducted 1989. The layout was rows 48 m long with spacing 0.75 m between rows. Each row was divided into basic units 3 m long, 16 per row. Total 576 basic units, each 2.25 m^2.

Field length: 36 plots * .75 m = 27 m

Field width: 16 plots * 3 m = 48 m

Data provenance: Data appear on page 28 in dot matrix print. OCR by ChatGPT. Manually (and tediously) corrected by K.Wright. The sorted data values increase by multiples of 0.0181. This was very useful in correcting the OCR errors of the dot matrix printout.

References

None

Examples

if (FALSE) {
library(agridat)
data(matusgutierrez.maize.uniformity)
dat <- matusgutierrez.maize.uniformity
require(desplot)
desplot(dat, yield ~ col*row,
        flip=TRUE, tick=TRUE, aspect=(36*0.75)/(16*3),
        main="matusgutierrez.maize.uniformity")
}