odland.soybean.uniformity {agridat}

Uniformity trials of soy hay and soybeans

Description

Uniformity trials of soy hay and soybeans at Virginia Experiment Station, 1925-1926.

Format

Data frames with 3 variables.

row

row

col

column

yield

yield: hay in tons, beans in bushels

Details

Grown at West Virginia Experiment Station in 1925 & 1926.

Soy beans:

Soybeans were planted in rows 30 inches apart. In 1926 the crop was harvested for seed, 55 rows, each 232 feet long. Yields of 8-foot plats were recorded. In 1926, data for the last row on page 96 seems to be missing.

Field width: 55 plots * 30 in / 12in/ft = 137.5 feet

Field length: 28 plots * 8 feet = 224 feet + border = total 232 feet.

Odland and Garber provide no agronomic context for the yield variation.

Soy hay:

In 1925 the crop was harvested for forage, 42 rows, each 200 feet long. Yields of 8-foot plats recorded.

Field width: 42 plots * 30 in / 12in/ft = 105 ft

Field length: 24 plots * 8 feet = 192 feet + border = total 200 feet.

Source

Odland, TE and Garber, RJ. 1928. Size of Plat and Number of Replications in Field Experiments with Soybeans. Agronomy Journal, 20, 93–108. https://doi.org/10.2134/agronj1928.00021962002000020002x

Examples

## Not run: 

library(agridat)
  
  libs(desplot)

  data(odland.soyhay.uniformity)
  dat1 <- odland.soyhay.uniformity
  desplot(dat1, yield ~ col*row,
          flip=TRUE, aspect=200/105, # true aspect
          main="odland.soyhay.uniformity")

  data(odland.soybean.uniformity)
  dat2 <- odland.soybean.uniformity
  desplot(dat2, yield ~ col*row,
          flip=TRUE, aspect = 232/137, 
          main="odland.soybean.uniformity")
  

## End(Not run)