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  • All fields: 23.3 x 18.8 cm
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    • Four-row corn planter, 1931

    • Farm Equipment; Agriculture; Iowa State University;
    • A four-row corn planter with front and rear components mounted on a steel-wheeled tractor. The photograph is from the front. The rear edge of the plowed field is directly behind the tractor. Along this boundary runs a line of conifer trees. A...

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