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Primary Source Sets
The Columbian Exchange
A photograph of a sweet potato plant, 1900.

A photograph of a sweet potato plant, 1900.

Sweet potato cultivation spread to Europe in the fifteenth century as a result of the Columbian Exchange, but it had already spread to Polynesia, Hawaii, and other Pacific islands around the ninth century. In this photograph, one can see many features of the plant. The leaves and stem at the top of the plant would be above ground when the potato is growing, while the fibrous roots and storage roots at the bottom of the plant would be below the surface. The storage roots are the sweet potatoes that, during harvest season, require some heavy labor to dig out of the ground.

Citation Information
“Sweet Potato,” Digital Public Library of America, https://dp.la/item/2b6297fdcb6dc3e50964d772379f8f40.
Note: These citations are programmatically generated and may be incomplete.
Courtesy of The New York Public Library.

Tips for Students

For this source, consider:

  • the author's point of view
  • the author's purpose
  • historical context
  • audience

Item 11 of 13 in the Primary Source Set The Columbian Exchange

Previous ItemNext Item
A drawing of Christopher Columbus.
An illustration of Christopher Columbus’s initial meeting with Native Americans.
An excerpt from the 1815 book The History of the Small Pox by James Carrick Moore.
A drawing of a sugar plantation.
An excerpt from The Potato, a 1917 book by Arthur W. Gilbert.
An 1891 photograph of a traditional Native American cow shield.
An excerpt from a 1672 book describing plant and bird discoveries in New England.
An excerpt from an 1890 book on horse training.
An Aztec codex prominently displaying maize, 1830.
An excerpt from a 1994 book of cultural ecology discussing Spanish missions.
A photograph of a sweet potato plant, 1900.
A fire pot depicting Aztec gods, circa 1325 to 1521.
An eighteenth-century illustration of a tomato plant.

These sets were created and reviewed by teachers. Explore resources and ideas for Using DPLA's Primary Source Sets in your classroom.

To give feedback, contact us at info@dp.la. You can also view resources for National History Day.

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