Uniformity trial of oats — kiesselbach.oats.uniformity • agridat

Uniformity trial of oats at Nebraska in 1916.

data("kiesselbach.oats.uniformity")

Format

A data frame with 207 observations on the following 3 variables.

row: row
col: column
yield: yield bu/ac

Details

Experiment conducted in 1916. Crop was Kerson oats. Each plot covered 1/30th acre. Oats were drilled in plats 66 inches wide by 16 rods long. The drill was 66 inches wide. Plats were separated by a space of 16 inches between outside drill rows.

The source document includes three photographs of the field.

1 acre = 43560 sq feet

1/30 acre = 1452 sq feet = 16 rods * 16.5 ft/rod * 5.5 ft

Field width: 3 plats * 16 rods/plat * 16.5 ft/rod = 792 feet

Field length: 69 plats * 5.5 ft + 68 gaps * 1.33 feet = 469 feet

Source

Kiesselbach, Theodore A. (1917). Studies Concerning the Elimination of Experimental Error in Comparative Crop Tests. University of Nebraska Agricultural Experiment Station Research Bulletin No. 13. Pages 51-72. https://archive.org/details/StudiesConcerningTheEliminationOfExperimentalErrorInComparativeCrop https://digitalcommons.unl.edu/extensionhist/430/

References

None.

Examples

# \dontrun{

library(agridat)
  
  data(kiesselbach.oats.uniformity)
  dat <- kiesselbach.oats.uniformity
  
  range(dat$yield) # 56.7 92.8 match Kiesselbach p 64.
#> [1] 56.7 92.8

  libs(desplot)
  desplot(dat, yield ~ col*row,
          tick=TRUE, flip=TRUE, aspect=792/469, # true aspect
          main="kiesselbach.oats.uniformity")
  
# }