US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Plant research. Technician grafting a sweet potato (Ipomoea batatas) plant (right) onto a virus- sensitive indicator plant (left) before performing agricultural experiments on inherited susceptibility to disease. This research was performed for the United States Department of Agriculture at the Beltsville Agricultural Research Center, Maryland, USA.
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