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U.S. Geological Survey (USGS) Scientists Collecting Soil-Pit Samples

By Environmental Health Program 2007 (approx.)
U.S. Geological Survey (USGS) scientists collecting soil-pit samples for a collaborative study with the U.S. Army near Yuma, AZ
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Detailed Description

U.S. Geological Survey (USGS) scientists collecting soil-pit samples for a collaborative study with the U.S. Army near Yuma, Arizona. Samples were used to determine physical properties and moisture conditions of the soil.

Sources/Usage

Public Domain.