The data give the yields of cotton and irrigation levels
in the Salt River Valley for different plots of land.
Each plot was on Maricopa sandy loam soil.
There are 14 observations on two variables.
Variables:
Irrigation
The amount of irrigation water applied in feet per acre.
Yield
The yield of Pima cotton in pounds per acre.
Data Quality:
There are no missing values.
Source:
The data come from Ezekiel, Mordecai and Fox, Karl A.
Methods of Correlation and Regression Analysis,
New York: John Wiley and sons, page 135.
Notes:
References:
The original source is
Muir, James C. and Smith, G. E. P. (1927).
"The use and duty of water in the Salt River Valley"
in
Agricultural Experiment Station Bulletin,
120.