AGRICOLA (AGRICultural OnLine Access), a database produced by the National Agricultural Library (NAL), consists of two subsets of records.
The database contains 5,200,000+ records and includes printed works from as far back as the 15th century.
AGRICOLA records describe publications and resources encompassing all aspects of agriculture and allied disciplines, including animal and veterinary sciences, entomology, plant sciences, forestry, aquaculture and fisheries, farming and farming systems, agricultural economics, extension and education, food and human nutrition, and earth and environmental sciences.
The AGRICOLA Government (USDA) version aka SEARCH is a great interface for carrying out a basic scoping search - or if you wish to identify a limited number of key references. You can also limit your search to only PubAg with the government version.
AGRICOLA through EBSCO has an easy-to-use interface that allows for a more comprehensive and systematic search and works easily with citation managers.
Using the Advanced Search option provides additional search limits. Searches may also be limited by author, corporate author, title, journal title (source), subjects, geographic terms, language, affiliation, series, and publication date.
Agricola has 'indexes' that are lists of authors, journal titles, subjects and geographic terms. There are also indexes of authors' names, country of publication, affiliations, and corporate authors.
*Tip: Watch out for different forms of an author's name if you are trying to find all of his or her work-- they are most commonly listed with initials, rather than full names.
If using the it is a good idea to check the National Agricultural Library Thesaurus (NALT) to see that you are using the best terms for your topic. Some terms are very specific, some are broad-- and some are unexpected.