Each commodity has a page of resources, with selected database links at the top, books and ebooks below. The books are listed roughly by the usefulness of the content related to the questions. There are other sources not listed on the page but you should be able to complete the task using just the sources provided.
Try variations of your search terms. Here are some example tips and strategies:
Remember that the term "Columbian Exchange" was coined in 1972 by Alfred Crosby, so it will not yield good search results for relevant publications before that date.
When searching the Library catalog it is recommended to use quotations around your term.
For example: "tea" or "corn" to avoid other search terms that begin with the same root such as teacher or cornucopia
Sample titles in ebook format (not a complete list). Check your specific commodity for other examples.
"Alfred W. Crosby on the Columbian Exchange" from Smithsonian
Columbian Exchange article from Bill of Rights Institute
Non-uniform tropical forest responses to the ‘Columbian Exchange’ in the Neotropics and Asia-Pacific - maps
The Effects of the Columbian Exchange (PBS) added Oct 2023
Interactive Map of the Columbian Exchange https://www.gilderlehrman.org/history-resources/online-exhibitions/interactive-map-columbian-exchange
Atlas of Exploration 910.9 KON