agridat (version 1.27)

mamani.bean.uniformity: Uniformity trial of bean

Description

Uniformity trial of bean in Costa Rica

Usage

data("mamani.bean.uniformity")

Format

A data frame with 1680 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield, grams per plot

Details

Experiment conducted at the Tropical Center for Teaching and Research in Turrialba, Costa Rica. Planted Dec 1969, harvested Apr 1970. There were 20 rows, harvested in 1 m units. Rows were 0.60 m separated. The data for sub-experment 3 appears in Mamani Arias (1971).

Field length: 20 rows * .6 m = 12 m

Field width: 84 columns * 1 m = 84 m

Data provenance: The original pdf document contained embedded text from OCR. The text was copied into Excel, then re-shaped in R. Large outliers were detected and corrected. The variance was calculated and compared to the source. Slightly different. Manually-compared all data values to source document.

Basic unit 902 had reported yield of "11 " (not " 11"). Clearly incorrect because all yield values were given as 3 digits like 093, 117. Replaced 11 with 115 (midway between the possible extremes 110 and 119).

References

Mamani Arias, L. (1972). Tamaño de la parcela para ensayos de rendimiento en frijol (Phaseolus vulgaris L.). Turrialba, 22(4), 469-470. Instituto Interamericano de Cooperación para la Agricultura (IICA), Costa Rica. https://repositorio.catie.ac.cr/bitstream/handle/11554/13122/BCO25060544e.pdf

Examples

if (FALSE) {
  library(agridat)
  data(mamani.bean.uniformity)
  dat <- mamani.bean.uniformity

  libs(desplot)
  desplot(dat, yield~col*row,
          flip=TRUE, aspect=(20*.6)/(84*1), tick=TRUE,
          main="mamani.bean.uniformity")

}