wheat {asbio}R Documentation

Agricultural randomized block design

Description

Allard (1966) sought to quantify variation in the yield in wheat grasses. Five wheat crosses were selected from a breeding program and were grown at four randomly selected locations where the wheat would be grown commercially. At each location crosses (families) were randomly assigned to particular sections of fields, i.e. at each location a one way randomized block design was conducted.

Usage

data(wheat)

Format

The dataframe has four columns:

yield

Refers to wheat yield.

loc

Refers to randomly selected locations where wheat were grown commercially. A factor with four levels: 1,2,3,4.

block

Refers to the replicate block within location. A factor with four levels: 1,2,3,4. Within each block five wheat crosses were randomly assigned and grown.

cross

Refers to wheat crosses. A factor with five levels: 1,2,3,4,5.

Source

Littell, R. C., Milliken, G. A., Stroup, W. W., Wolfinger, R. D., and O. Schabenberger (2006) SAS for Mixed Models 2nd ed. SAS press.


[Package asbio version 1.7 Index]