A prairie is a broad stretch of grassland. The name was given to the large area of the Mississippi Valley by early French explorers. The prairie is the region located in the central part of the United States. It is bordered by heavy forests on the east and the mountains on the west. It is from 300 to 1400 feet above sea level.
   The prairies are considered treeless, but the streams running through them are lined with many varieties of trees. The open country is covered with coarse grasses and other kinds of vegetation. The soil is dark and fertile, and covered with a layer of fine dust. The climate of the prairies is severe since it is unprotected from the winds in whiter and the intense heat in the summer. It has an annual rainfall of about 30 inches, occurring mostly in the spring and summer,