Uniformity trial of cotton in South Rhodesia

Usage

data("mckinstry.cotton.uniformity")

Format

A data frame with 480 observations on the following 3 variables.

row: row ordinate
col: column ordinate
yield: yield per plot, ounces

Details

A uniformity trial of cotton from an experiment in Gatooma, South Rhodesia. Conducted by the Empire Cotton Growing Corporation. Planted Nov 1934. Harvested Jun 1935.

Field length: 20 rows x 25 feet.

Field width: 24 columns x 3.5 feet.

Crop History: season good until peak flowering - good growth, heavy flowering - then 5 weeks drought in critical period for crop, aggravated by exceptionally heavy aphis attack and heavy boll-worm attack accounts.

Lay-out: At harvest, a block of 24 rows x 500 ft, and each row marked into 20 lengths of 25 ft each, giving 480 small plots. If any use is to be made of these data it would be advisable to ignore the row 1 and row 20, as both of these are bordering roads.

This data was made available with special help from the staff at Rothamsted Research Library.

Source

Rothamsted Research Library, Box STATS17 WG Cochran, Folder 5.

References

None

Examples


library(agridat)
data(mckinstry.cotton.uniformity)
dat <- mckinstry.cotton.uniformity

libs(desplot)
desplot(dat, yield ~ col*row,
        flip=TRUE, tick=TRUE, aspect=(20*25)/(24*3.5),
        main="mckinstry.cotton.uniformity")