Testing soil samples. Scientist using a soils sample grader (upper left) in a laboratory at a quarry. The quarry produces Fuller's earth, a highly abs

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Testing soil samples. Scientist using a soils sample grader (upper left) in a laboratory at a quarry. The quarry produces Fuller's earth, a highly absorbent clay. The sample grader consists of a tower of sieves that get gradually finer from top to bottom. Photographed in Oxfordshire, UK.

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Size: 3532px × 4945px
Photo credit: © STEVE ALLEN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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