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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.
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 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).
Farmland in Dickinson County.
Aerial photos of farmland in Dickinson County, Iowa.
Contour Crops.
Contour crops in Dickinson 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.
Field of contoured beans on the Duncan farm.
Photo of a field of contoured beans on the Duncan farm in Cherokee County, Iowa..
Contoured cornfield.
Photo of contoured cornfield in Cherokee County, Iowa.
Contoured cornfield after heavy rain.
Photo of a contoured cornfield after heavy rain in Cherokee County, Iowa..