Leopold Center for Sustainable Agriculture



The Leopold Letter is published quarterly.

Annual Report

“When we see land as a community to which we belong, we may begin to use it with love and respect.” – Aldo Leopold Sometimes you need to go back to your roots, and this annual report for the Leopold Center is sprinkled with thoughts from Aldo Leopold’s many writings. His...

On The Ground Videos

Integrated crop and livestock systems utilize manure as an organic source of fertilizer, but within this manure are bacteria that may contaminate water bodies if transported off the field by rain. Iowa State University professor Michelle Soupir describes her field and lab studies of bacterial movement from manure to soil to water, as well as the survival of potentially disease-causing bacteria that are resistant to antibiotics used to treat livestock and humans. Filmed June 2013