National Agricultural Library (USDA)The NAL is the coordinator for a national network of State land-grant and U.S. Department of Agriculture (USDA) field libraries. In its international role, the NAL serves as the U.S. center for the international agricultural information system, coordinating and sharing resources and enhancing global access to agricultural data. The NAL's collection of over 3.3 million items make it the foremost agricultural library in the world.