agridat (version 1.27)

alvarezcajas.sugarcane.uniformity: Uniformity trial of sugarcane in Guatemala

Description

Uniformity trial of sugarcane in Guatemala.

Usage

data("alvarezcajas.sugarcane.uniformity")

Format

A data frame with 600 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield per plot, kg

Details

A uniformity trial of sugarcane conducted at a commercial sugarcane plantation located at Finca Bulbuxya, Jurisdiction of the Municipality of San Miguel Panam, Department of Suchitepéquez, Bulbuxyá, Guatemala. Harvested 1981. Latitude 14 deg 39 min 39 sec, Longitude 91 deg 22 min.

Field width: 15 columns x 1.6 m = 24 m

Field length: 40 rows x 2 m = 80 m

The mean and standard deviation calculated from this data is slightly different from the source. The table of basic unit yield values in the source document contains some values that are very similar, for example 33.1122, 33.1126, 33.1132. It seems likely that these values must have been identical when the data were collected, but perhaps typed incorrectly in the source document or similar error at some point.

Data provenance: OCR performed by Claude. Hand-corrected by K.Wright.

References

None

Examples

if (FALSE) {
library(agridat)
data(alvarezcajas.sugarcane.uniformity)
dat <- alvarezcajas.sugarcane.uniformity

mean(dat$yield) # 27.21
sd(dat$yield)   # 9.81

libs(desplot)
desplot(dat, yield ~ col*row,
        flip=TRUE, tick=TRUE, aspect=(40*2)/(15*1.6),
        main="alvarezcajas.sugarcane.uniformity")

}