I really don't know about Indian but I would be surprised if there are not at least a few counties that had corn and soybean grower organizations. They probable aren't part of the check off but I would guess that they would know a lot about how the check off is working and what is happening with your state check off and chances are that they work closely with the check off boards.

Here is a link to their state website that can answer a lot of questions for anyone. http://www.incorn.org/