A data set from Oehlert (2000) \emph{A First Course in Design and Analysis of Experiments}, New York: W. H. Freeman. Data modeled on results in Wedin, D.~A. (1990). {\em Nitrogen Cycling and Competition among Grass Species}. Ph. D. thesis, University of Minnesota, Minneapolis, MN. Treatments 1 through 6 are nitrogen 1 nonirrigated; nitrogen 1 irrigated; nitrogen 2 nonirrigated; nitrogen 3 nonirrigated; nitrogen 4 nonirrigated; nitrogen 4 irrigated. Columns are treatment and percent big bluestem.