Massive plough used to turn valuable soil covered by layers of sand in California.
Full title reads: "Follow This Plough".
California, United States of America (USA).
Dust bowl - farmers use massive industrial plough to remove layers of sand covering good soil.
Various shots of three tractors pulling huge piece of agricultural machinery across dusty field. The plough's large blade leaves a six feet furrow in field. Heavy flooding has covered rich soils of Loame (sp.?) Plain in sand.