The rental rates per acre for corn and soybeans in the Southeast District remained the same from last year to this year according to Iowa State University Extension and Outreach. Rates for this district are $229 per corn and soybean acre. District 9 includes Washington, Louisa, Keokuk, Mahaska, Wapello, Jefferson, Henry, Des Moines, Lee, Van Buren and Davis Counties. The most expensive rate was $288 in District 4, the west-central part of the state.