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Contour Ridge Construction by Three UNIDENTIFIED Men/Elk City Project
Photograph of three UNIDENTIFIED men constructing contour ridges on a field, which has been in cultivation but is being retired to permanent pasture. The back of the photograph proclaims, "Construction of contour ridges on a field which has been in cultivation but is being retired to permanent pasture. To be followed with later pictures."
Date:
April 2, 1938
Creator:
Hufnagle, Richard W.
System:
The Gateway to Oklahoma History
Elk City Project
Photograph of diversion terrace built entirely from the upper side. It provides protection for the terraced field below.
Date:
April 2, 1938
Creator:
Hufnagle, Richard W.
System:
The Gateway to Oklahoma History
Elk City Project
Photograph of terrace maintenance. Plowing up to the terrace.
Date:
April 2, 1938
Creator:
Hufnagle, Richard W.
System:
The Gateway to Oklahoma History
Grass, Legume and Forb Cultivation
Photograph of a strip of hairy vetch and rye fertilized with 150 pounds of superphosphate. OK-10-152.
Date:
July 2, 1949
Creator:
Jordan, M. E.
System:
The Gateway to Oklahoma History
Soil Sample Evaluation from Two Different Areas
Photograph of "Two samples of a soil showing the deterioration that [took] place if the cropping system consists mainly of soil-depleting crops. The soil on the left has been used to grow soil-depleting crops year after year over a long period of time. The sample on the right was taken from an area where the soil has been rotated with soil improving crops part of the time."
Date:
August 2, 1967
Creator:
Frie, J. W.
System:
The Gateway to Oklahoma History