In 1995, the USDA reorganized this Service as part of its whole reorganization. Those who reenact come into contact with many of my little friends. The information is in the form of documents and services provided by that office and your state's land-grant university. This information is also generalized and specific to your state. Services includes insect identification, plant disease diagnosis, soil samples, and recommendations in these areas.
Some services cost.
For example, if an extension agent at a county office can't identify an insect, he or she might send it to the university. Check out your state's services. Those of you in reenacting who thought of ways a lot of this information can help you in our hobby, have my permission to pat yourselves on the back. Let me say that again in case you missed it. Call and ask them where they are.