nin89 is an advanced Nebraska Intrastate Nursery (NIN) breeding trial conducted at Alliance in 1988/89.
To load the file into ASReml-R and view the contents use the commands:
library(asreml) data(package="asreml") data("nin89") View(nin89)
|A data frame with 11 colums and 242 rows:|
|Variety||A factor with 56 levels|
|Id||A factor with 56 integral levels|
|pid||A numeric variate containing plot numbers|
|Rep||A factor with 4 levels|
|nloc||Trial location (4)|
|yield||Grain yield in t/ha|
|Row||A factor with 22 levels|
|Column||A factor with 11 levels|
Four replicates of 19 released cultivars, 35 experimental wheat lines and 2 additional triticale lines were laid out in a 22 row by 11 column rectangular array of plots; the varieties were allocated to the plots using a randomised complete block (RCB) design.
Stroup WW, Baenziger PS and Mulitze DK (1994). “Removing Spatial Variation from Wheat Yield Trials: A Comparison of Methods.” Crop Science, 86, pp. 62-66.