<div class="description">
<ul><li><b>Scope and content:</b>  This photograph shows the Imperial Valley, the most fertile area for agriculture in the United States today, as it existed after the mammoth federal, state and local irrigation projects of the 1920s-1930s.</li></ul></div>
<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
1941<div style="display: none;">date QS:P571,+1941-00-00T00:00:00Z/9</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>