Contoured watershed on L.C. Shivvers' farm in Knoxville, Iowa. Farm maintained by Leo Goad and Howard Shannon. This 50 - acre cornfield received 3 - inch rains in 8 days. No washing. Contouring and grassed waterway shown in the foreground of the…
Contour farmng on Cyril Rees' farm NE of Pleasantville in Marion County, Iowa. 25 acre field seeded to oats on contour with buffer strips following corn in 1943. Buffers and waterways seeded in 1941. Very little erosion.
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.
