Uniformity trial of potatoes
Uniformity trial of potatoes at Saskatchewan, Canada, 1929.
data("kalamkar.potato.uniformity")A data frame with 576 observations on the following 3 variables.
rowrow
colcolumn
yieldyield of potatoes per plot
The data is for potato yields in 96 rows, each 132 feet long, with 3 feet between rows.
Each row was harvested as six plots, each 22 feet long. Each hill had one seed piece. Hills were spaced 2 feet apart in each row.
Field width: 6 plots * 22 feet = 132 feet
Field length: 96 rows * 3 feet = 288 feet
Kalamkar, R.J. (1932). Experimental Error and the Field-Plot Technique with Potatoes. The Journal of Agricultural Science, 22, 373-385. https://doi.org/10.1017/S0021859600053697
## Not run:
library(agridat)
data(kalamkar.potato.uniformity)
dat <- kalamkar.potato.uniformity
# Similar to figure 1 of Kalamkar
libs(desplot)
desplot(dat, yield~col*row,
flip=TRUE, tick=TRUE, aspect=288/132, # true aspect
main="kalamkar.potato.uniformity")
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.