The National Agricultural Library Digital Repository (NALDR) includes more than 2,100 individual volumes or issues, representing 29 unique series or book titles. Visit the repository.
From the web site: The NALDR provides access to publications either digitized by NAL or through NAL’s partnerships with other institutions (see NALDR Projects). The majority of the publications available in the NALDR were published by the US Department of Agriculture. Examples include the Agriculture Information Bulletin, the Agricultural Economic Report, and the Yearbook of the U.S. Department of Agriculture. A comprehensive list of full text publications is provided on the Publications - Additional Information page.