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Great Plains' Historical Stability Vulnerable To Future Changes

Date:
October 3, 2007
Source:
American Institute of Biological Sciences
Summary:
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. Yet substantial environmental impacts have resulted, including loss of soil carbon and high nitrate runoff, especially in irrigated areas.
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A survey of long-term trends in population, farm income, and crop production in the agricultural Great Plains concludes that threats to society and the environment are counterbalanced by "surprising stability" and the potential for short- and medium-term sustainability.

The survey, published in the October 2007 issue of BioScience, 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.

Rural counties with extensive irrigation have slightly increased their populations, although less-irrigated counties, which offer fewer opportunities for farm-associated work, have decreased theirs slightly. The Great Plains' population is nonetheless falling behind that of the country as a whole, and their proportion of people over 55 has grown rapidly.

The authors, William J. Parton and Dennis Ojima of Colorado State University and Myron P. Gutmann of the University of Michigan, note that the increases in crop productivity have had substantial environmental impacts, including loss of soil carbon and high nitrate runoff, especially in irrigated areas. Farms have become more dependent on government subsidies to meet the increased costs of agricultural inputs and fuel.

Plans to develop biofuels could benefit agricultural counties, but increased crop prices also threaten income from livestock production and could accelerate soil erosion while reducing soil carbon. Declining aquifers and increasing fuel costs represent another potentially worrisome trend, since both will add to the cost of irrigation.


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Cite This Page:

American Institute of Biological Sciences. "Great Plains' Historical Stability Vulnerable To Future Changes." ScienceDaily. ScienceDaily, 3 October 2007. <www.sciencedaily.com/releases/2007/10/071001081704.htm>.
American Institute of Biological Sciences. (2007, October 3). Great Plains' Historical Stability Vulnerable To Future Changes. ScienceDaily. Retrieved May 23, 2017 from www.sciencedaily.com/releases/2007/10/071001081704.htm
American Institute of Biological Sciences. "Great Plains' Historical Stability Vulnerable To Future Changes." ScienceDaily. www.sciencedaily.com/releases/2007/10/071001081704.htm (accessed May 23, 2017).

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