Niels Ebbesen Hansen
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Niels Ebbesen Hansen (January 4, 1866 – October 5, 1950) was a Danish-American horticulturist, botanist, and agricultural explorer for the United States Department of Agriculture and the state of South Dakota. He searched the harsh environments of northern Scandinavia, Siberia, Manchuria, and the dry steppes of the Volga for plant stock that could flourish on the upper Great Plains.