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IOWA: A landscape highly modified over time

October 15, 2011
By GARRY BRANDENBURG , Times-Republican

PRAIRIES are grasslands, tiny remnants of a once vast 'sea of grass' that stretched across the entire mid section of America. For Iowa, a land with a deep and productive soil base, prairies helped to create the rich topsoil in the first place, are now relegated to less than one-tenth of one percent of our 55,875 square miles of land. Scientists know that it took about one century to make each new inch of topsoil.

 
 
 

 

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