<p>A person's hands use a pocket knife to fill a small, screened plastic oval with a soil sample.</p>
<p>Transferting a piece of soil to equipment used for stability testing.</p>
<ul><li>Keywords: coronado national memorial; arizona; sonoran desert network; national park service; vegetation monitoring</li></ul>
Alice Wondrak-Biel
Taken on 27 October 2011
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