Duke University Professor Dan Richter collects soil samples at the Calhoun Experimental Forest in South Carolina in 2008.
Duke University Professor Dan Richter collects soil samples at the Calhoun Experimental Forest in South Carolina in 2008. Megan Morr Duke Photography
Duke University Professor Dan Richter collects soil samples at the Calhoun Experimental Forest in South Carolina in 2008. Megan Morr Duke Photography

Duke collection a time capsule of Piedmont soil conditions

May 08, 2016 04:00 PM

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