Small Changes, Big Impacts: Prairie Conservation Strips
Agriculture in Iowa owes its immense productivity to an extreme trade-off. Once, perennial prairie covered 85 percent of the state, and its deep root network built and held together a fertile topsoil layer many feet deep. Now, more than 85 percent is in agricultural production, with the majority in row crops.
This is a report of the STRIPS research team, Leopold Center for Sustainable Agriculture (2014): pp. 1-4.