Coach Hayden Fry came up with the ANF sticker in the 1980s to help America's Farmers during the Farm crisis. Remember that many football players at Iowa over the years were and are hardworking, blue collar kids raised on Iowa Farms. Wearing that helmet sticker has special meaning to many.
And you are correct, Iowa State is an Ag school. A damn good one. Also they have a good engineering program.
The University of Iowa is known for
- Doctor's/Medicine/Children's Hospital
- Lawyers/Business/Writing
- Arts/Sciences
Not bad for a little flyover state of 3.5 million