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Contour Bean Field - Minimum Tillage on the Smith Farm.
Contour bean field with minimum tillage on the Smith farm in Okoboji Township, Dickinson County, Iowa. (Old ponderosa farm).
Contour Corn Field on Ed Guthrie's Farm.
Contour corn field on Ed Guthrie's farm in Okoboji Township, Dickinson County, Iowa.
Contour Crops on Harry Brown's Farm.
Contour crops on Harry Brown's farm in Superior Township, Dickinson County, Iowa.
Contour Crops.
Contour crops in Dickinson County, Iowa.
Contour Strip Crop on Orville Berg's Farm.
Contour strip crop on Orville Berg's farm in Dickinson County, Iowa. Bob Ingwersen is the pilot, and Adolph Ladegard is the photographer.
Contoured cornfield after heavy rain.
Photo of a contoured cornfield after heavy rain in Cherokee County, Iowa..
Contoured cornfield.
Photo of contoured cornfield in Cherokee County, Iowa.
Contoured cornfield.
Photo of contoured cornfield in Cherokee County, Iowa.
Corn in contoured field on the Davey farm.
Corn in contoured field on Ray Davey's farm in Warren County, Iowa.
Donald Gray driving new 2-way plow, 1966
Donald Gray driving new 2-way plow to assist with Gray farm's 300 acres of contoured crops.