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The grasslands of North American are called as prairies; they cover about 1.4 million square miles or 15% of the continent.
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The grasslands of North American are called as prairies; they cover about 1.4 million square miles or 15% of the continent. They are widely scattered for about one thousand miles in the very center of North America, from the Rocky Mountains to Indiana. Accordingly to the amount of rainfall and temperature there are three types of prairies grasslands: tall grass prairie in the east, mixed grass prairie in middle part and short glass prairie in the west. Grasslands are growing in areas of limited precipitation with moderate temperatures changing from -20 to 100 F, precipitation varies in range of 15-100 cm, the amount of rainfall decreases from east to west. The soil of the grasslands varies from a few centimeters in the west to two meters deep in the east of prairies; it is deep and black, with fertile upper layers. As to organic content, soils are changing from a...
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