Wheat Yields by growing conditions

Description

The Wheat data frame has 48 rows and 4 columns.

Format

This data frame contains the following columns:

Tray

an ordered factor with levels 3 < 1 < 2 < 4 < 5 < 6 < 8 < 9 < 7 < 12 < 11 < 10

Moisture

a numeric vector

fertilizer

a numeric vector

DryMatter

a numeric vector

Source

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York.