Description Usage Format Note Source
Atrazine concentration in shallow groundwater before (June) and after (September) the application season.
1 |
A tibble with 48 rows and 2 variables:
Month
month of atrazine concentration measurement
Concentration
atrazine concentration, in ppm
The data comes from Statistical Methods for Water Resources Book written by: DR.Helsel and R.M. Hirsch (2002).
http://water.usgs.gov/pubs/twri/twri4a3/
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