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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.
Contour Crops.
Contour crops in Dickinson County, Iowa.
Farmland in Dickinson County.
Aerial photos of farmland in 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).
Contour Crops on Harry Brown's Farm.
Contour crops on Harry Brown's farm in Superior Township, Dickinson County, Iowa.
Contour Corn Field on Ed Guthrie's Farm.
Contour corn field on Ed Guthrie's farm in Okoboji Township, 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.
Corn in contoured field on the Davey farm.
Corn in contoured field on Ray Davey's farm in Warren County, Iowa.
Residue contoured crops on the farm of Fred Conley.
Photos of the Fred Conley farm with residue contoured crops in Cherokee County, Iowa.
Contoured cornfield.
Photo of contoured cornfield in Cherokee County, Iowa.