PubAgPubAg is the U.S. Department of Agriculture (USDA), National Agricultural Library's (NAL) search system for agricultural information. It is available for free on the Internet at: https://pubag.nal.usda.gov/. PubAg covers all of the core topics of the agricultural sciences including nutrition, food safety, food quality, animal and crop production and protection, natural resources, sustainable agricultural systems, rural development, agricultural economic and policy issues, agricultural imports and exports, agricultural statistics, extramural research, and Extension education.
PubAg is part of the AGRICOLA family of products.
But, while there is some overlap between the two resources, they are different in significant ways.