Erosion on Van Roekel farm 3 miles South of Monroe in Marion County, Iowa. No grassed waterway. Oats planted up and down hill. Silt fan formed below 2 foot gully. 20 tons soil lost per acre.
Erosion on Mike Murphy's estate 5 miles East of Pleasantville in Marion County, Iowa. Silting and erosion from heavy rain on a 4% slope. Estate is maintained by John Flahive.