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Computer models show how crop production increases soil nitrous oxide emissions • News Service • Iowa State University

Computer models show how crop production increases soil nitrous oxide emissions • News Service • Iowa State University
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Iowa State University , United States , Loren King , Chaoqun Lu , Global Change Biology ,

Midwestern farms suffocating Gulf of Mexico ecosystems


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2009 satellite image of the Gulf of Mexico, where the Hypoxic Zone occurs. Image: Jeff Schmaltz, NASA Earth Observatory
By Lillian Young
Fertilizer runoff from seasonal heavy rainfall on Midwestern farms is traveling down the Mississippi River and creating a “hypoxic zone,” or low oxygen zone in the Gulf of Mexico, a recent study by Iowa State University scientists warns. The damage threatens the natural life and environment in the area, it says.
The Great Lakes face a similar threat from nitrogen runoff.
The scientists used computer modeling methods to see how much nitrogen from Midwestern farming fertilizers makes its way into ecosystems. The results showed that significant runoff goes as far south as the Gulf, where it contributes heavily to the hypoxic zone. ....

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