Uniformity trial of sugarcane in Guatemala

Uniformity trial of sugarcane in Guatemala.

Usage

data("palenciaortiz.sugarcane.uniformity")

Format

A data frame with 468 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield per plot, kg

Details

A uniformity trial of sugarcane (Saccharum officinarum L.) conducted at Estación Experimental Agrícola Sabana Grande, Municipio de Escuintla, Guatemala. Latitude 14 deg 23 min N, Longitude 90 deg 49 min W.

The land was divided into 468 parcels of 2 m x 2 m (18 rows x 26 columns).

Field width: 26 columns x 2 m = 52 m

Field length: 18 rows x 2 m = 36 m

Data provenance: OCR from thesis page 14. Checked by K.Wright.

Source

Palencia Ortiz, Julia Anibal (1965). Determinación del tamaño óptimo de parcela para estudios experimentales en caña de azúcar (Saccharum officinarum L.) bajo las condiciones de la estación experimental agrícola Sabana Grande. University of San Carlos, Guatemala. https://biblos.usac.edu.gt/opac/record/87128

References

None

Examples

if (FALSE) { # \dontrun{
library(agridat)
data(palenciaortiz.sugarcane.uniformity)
dat <- palenciaortiz.sugarcane.uniformity

sum(dat$yield) # matches source document 8878.03
var(dat$yield) # matches source document 39.85

# Gradient shows higher yield in lower right
libs(desplot)
desplot(dat, yield ~ col*row,
        flip=TRUE, tick=TRUE, aspect=(18*2)/(26*2),
        main="palenciaortiz.sugarcane.uniformity")

} # }