What Was a Ton of Manure Worth in 1920?

That was a question asked by farmers in 1920. And scientists at the Iowa State University (ISU) agriculture experiment station at Ames had an answer. Scientists at the facility tested several soil types throughout the state to find an answer to the critical question that was on farmers’ minds at the time.

News Quiz: Draining Iowa’s Farmland

For over a century, drainage tiles have played a significant role in Iowa agriculture. But tile systems have also been targets of criticism from environmentalists who point to tiles’ environmental impact. How much do you know about Iowa’s drainage tiles?