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Plained furrows, 1942

A group of three men are standing in a plowed field. The furrow in the middle is considerably lower than those on either side.

A man is standing in a plowed field measuring the depth of a furrow with a measuring rod. The furrow is considerably lower than the surrounding area.

Two men are standing in a plowed field. One is holding a measuring rod while the other users a stretched rope to indicated the depth of the furrow.

Thirteen students observe someone driving a tractor and cultivating a field.

Dr. Clarence Bockhop (left) and two students observe a plain tillage linkage system with a model tractor.

A group of three men are standing in a plowed field. The furrow in the middle is considerably lower than those on either side.

A man is standing in a plowed field measuring the depth of a furrow with a measuring rod. The furrow is considerably lower than the surrounding area.

Two men are standing in a plowed field. One is holding a measuring rod while the other users a stretched rope to indicated the depth of the furrow.

Thirteen students observe someone driving a tractor and cultivating a field.

Dr. Clarence Bockhop (left) and two students observe a plain tillage linkage system with a model tractor.