Design your own study to investigate another grain. Answer questions similar to those asked in Exercise 13.91. Use the Internet and the U.S. Department of Agriculture’s National Agricultural Statistics Service website (http://www

.usda.gov/nass/) to find your data. The data sets posted will contain extra information that makes the data in its original format unusable. However, this unwanted information can easily be removed by deleting the unwanted rows and columns.

(Note: http://www.aragriculture.org/News/ also has many data sets posted.)