![](https://webarchive.library.unt.edu/eot2008/20090509074558im_/http://www.nsf.gov/images/x.gif) News From the Field Great Plains' Historical Stability Vulnerable to Future Changes
![](https://webarchive.library.unt.edu/eot2008/20090509074558im_/http://www.nsf.gov/images/greenlineshort.jpg)
September 27, 2007
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A survey of long-term trends in population, farm income and crop production in the agricultural Great Plains finds that technological advances, such as improved crop varieties, irrigation and fertilizer use, have greatly increased production of major crops and allowed rural populations to remain stable over the past 50 years, even as metropolitan populations have soared.
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Source American Institute of Biological Sciences
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