agridat (version 1.23)

nonnecke.sweetcorn.uniformity: Uniformity trial of sweet corn

Description

Uniformity trials of sweet corn in Alberta, 1956.

Usage

data("nonnecke.sweetcorn.uniformity")

Format

A data frame:

loc

location

row

row

col

column

yield

yield of marketable ears, pounds

Details

Experiments were conducted at three locations in Southern Alberta at Lethbridge, Vauxhall, and Cranford in 1956. Plot layout was 32 rows, each 179 feet long, allowing 18 ten-foot plots per row. Rows were 3 feet apart, thinned to one foot between plants. A double guard row surrounded the entire plot. The same two persons were assigned to harvest the corn from all locations. All 576 plots were harvested in one day. Optimal plot sizes were found to be 10ft x 6ft or 20ft by 3ft. The R data uses row/column for plot/row.

Field width: 18 plots * 10 ft = 180 feet

Field length: 32 rows * 3 ft = 96 feet

References

I. L. Nonnecke, 1959. The precision of field experiments with vegetable crops as influenced by plot and block size and shape: I. Sweet corn. Canadian Journal of Plant Science, 39(4): 443-457. Tables 1-7. https://doi.org/10.4141/cjps59-061

Examples

if (FALSE) {

  library(agridat)
  
  # Corn 1
  data(nonnecke.sweetcorn.uniformity)
  dat <- nonnecke.sweetcorn.uniformity

  libs(desplot)
  desplot(dat, yield~col*row|loc,
          flip=TRUE, tick=TRUE, aspect=96/180, # true aspect
          main="nonnecke.sweetcorn.uniformity")
    
}