Agriculture Handbooks –https://pubs.nal.usda.gov/sites/pubs.nal.usda.gov/files/aghandbk.htm
Representative questions that can be answered with this resource:
- What were some manuals 20th century farmers might used to identify insects?
- How would farmers ship their produce overseas?
- What are common chicken feeding techniques?
Index to handbooks published by the USDA since 1950 on a number of topics. Some links to full text. Useful for deciding what a farmer ought to know.