odland.soybean.uniformity.Rd
Uniformity trials of soy hay and soybeans at Virginia Experiment Station, 1925-1926.
Data frames with 3 variables.
row
row
col
column
yield
yield: hay in tons, beans in bushels
Grown at West Virginia Experiment Station in 1925 & 1926. Soybeans were planted in rows 30 inches apart.
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.
Soy beans
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.
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
# \dontrun{
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")
# }