"They're red! They're orange! They're purple! They live underground. They help plants grow. We can eat them, too. They're roots! Find out how roots help plants grow and learn about some of the roots we eat"--Google Books.
Relates the history and describes the use and production of such roots and tubers as potatoes, yams, cassava, carrots, beets, turnips, radishes, and parsnips. Includes recipes.