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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K8677-1

Rangeland scientist Justin Derner (left) and ecologists Wayne Polley (foreground) and Hyrum Johnson measure soil CO² emissions in the CO²-gradient tunnel systems.

Photo by Scott Bauer.

640 pixels wide: (k8677-1.jpg)

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Last Modified: 5/23/2006
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