5. GenAG, Inc., a genetics engineering laboratory specializing in the production of better seed varieties for commercial agriculture, is analyzing the yield response to fertilizer application for a new variety of overlineley that it has developed. GenAg has planted 40 acres of the new overlineley variety and has applied a different fixed level of fertilizer to each one-acre plot. In all other respects the cultivation of the crop was identical. The GenAg scientists maintain that the relationship between