Iowa farmland cash rental rates fell 4.8 percent this year, declining for the fourth year in a row as corn and soybean prices remain soft, according to the Iowa State University (ISU) Extension 2017 Cash Rent survey.

Average cash rent prices have plunged 18.9 percent since 2012 after hitting a high of $270 per acre. Crop prices have dropped by 50 to 60 percent over the same...