<p>Students build soil models to learn the makeup of soil and how the elements work together.
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Photos by Stacey A Olson.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/76340031@N02">Bureau of Land Management - Utah</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/blmutah/33682164794/">Building soil models</a>