baker.wheat.uniformity {agridat} | R Documentation

## Uniformity trial of wheat

### Description

Uniformity trial of wheat

### Usage

    data("baker.wheat.uniformity")

### Format

A data frame with 225 observations on the following 3 variables.

`row`

  row

`col`

  col

`yield`

  yield

### Details

Data was collected in 1939-1940. The trial consists of sixteen 40 ft. x 40 ft. blocks subdivided into nine plots each. The data were secured in 1939-1940 from White Federation wheat. The design of the experiment was square with alleys 20 feet wide between blocks. The plots were 10 feet long with two guard rows on each side.

Morning glories infested the middle two columns of blocks, uniformly over the blocks affected.

The data here include missing values for the alleys so that the field map is approximately correct.

Field width: 4 blocks of 40 feet + 3 alleys of 20 feet = 220 feet.

Field length: 4 blocks of 40 feet + 3 alleys of 20 feet = 220 feet.

### Source

G. A. Baker, E. B. Roessler (1957). Implications of a uniformity trial with small plots of wheat. Hilgardia, 27, 183-188.

### References

None

### Examples

    data(baker.wheat.uniformity)
    dat <- baker.wheat.uniformity

    require(desplot)
    desplot(yield ~ col*row, dat,
            flip=TRUE, aspect=1,
            main="baker.wheat.uniformity")

[Package agridat version 1.16 Index]