igue.sugarcane.uniformity {agridat} | R Documentation

## Uniformity trial with sugarcane

### Description

Uniformity trial with sugarcane in Brazil, 1982.

### Usage

    data("igue.sugarcane.uniformity")

### Format

A data frame with 1512 observations on the following 3 variables.

`row`

  row

`col`

  column

`yield`

  yield, kg/plot

### Details

A uniformity trial with sugarcane in the state of Sao Paulo, Brazil, in 1982. The field was 40 rows, each 90 m long, with 1.5 m between rows.

Field width: 36 plots * 1.5 m = 54 m

Field length: 42 plots * 2 m = 84 m

### Source

Toshio Igue, Ademar Espironelo, Heitor Cantarella, Erseni Joao Nelli. (1991). Tamanho e forma de parcela experimental para cana-de-acucar (Plot size and shape for sugar cane experiments). Bragantia, 50, 163-180. Appendix, page 169-170. http://dx.doi.org/10.1590/S0006-87051991000100016

### References

None

### Examples

    ## Not run:

      data(igue.sugarcane.uniformity)
      dat <- igue.sugarcane.uniformity

      # match Igue CV top row of page 171
      sd(dat$yield)/mean(dat$yield) # 16.4

      require(desplot)
      desplot(yield ~ col*row, dat,
              flip=TRUE, tick=TRUE, aspect=(42*2)/(36*1.5),
              main="igue.sugarcane.uniformity")

    ## End(Not run)

[Package agridat version 1.16 Index]