Table S9.

Fields in Iowa with a contiguous field area of 5, 10, or 15 ha with 4–10% slopes according to relevant land-use categories

Field area with 4–10% slopeAll row-crop fields*, haAll corn or soybean fields, haAll row-crop fields*, %All corn or soybean fields, %
≥5 ha5,948,5665,937,38040.840.8
≥10 ha3,958,6743,952,19527.227.1
≥15 ha2,650,3392,646,13618.218.2
  • * Row crops grown in Iowa are primarily corn and soybean but also include small grain, fruit, and vegetable crops.