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Classification Codes

Knowledge Area (KA) Codes are required for all projects submitted to USDA. This link provides a listing of all the KA codes to accommodate the broad focus of research, higher education, and extension work sponsored by USDA.

The Subject of Investigation (SOI) codes, identifies the commodity, product, organism, entity, resource, or technology not related to specific commodities or resources, that represents the intended target or focus of the research or for which the application of the research is intended.

The Field of Science (FOS) codes helps identify the specific science or technology that constitutes the basic mechanism of the investigation.