A:
Agricultural Systems Research Unit - Develops and implements state-of-the-art simulation models and other products aimed at improving our understanding of how agricultural systems work and how they can be managed. Formerly called Great Plains Systems Reserch Unit [Department of Agriculture (USDA), Agriculture Research Service (ARS)]

E:
Extraterrestrial Life-Science Tracer Bullet - Information about life outside of the Earth included cited references and related material in the library of congress collections [Library of Congress]

N:
National Agriculture Compliance Assistance Center - Is the first stop for information about environmental requirements that affect the agricultural community [Environmental Protection Agency (EPA)]

P:
Production Input Industries - Key Topic (ERS) - Covers information on pesticides, fertilizers, machinery, energy, seed, and biotechnology products, all of which are agricultural production inputs. [Department of Agriculture (USDA), Economic Research Service (ERS)]