Photograph of plots 1, 2, and 3 on the Red Plains Conservation Experiment Station. The back of the photograph proclaims, "Plots 1, 2, and 3 of the Control Plots established in 1929 to record soil and water losses from different kinds of cover and cropping systems, on Stevensville Fine sandy Loam with 7.7% slope. Plots 1, 2, and 3 are the length of slope studies.
Photograph of the Red Plains Experiment Station, Guthrie, OK. Vernon fine sandy loam, lower B horizo...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...
Photograph of plots 8, 9, and 10 on the Red Plains Conservation Experiment Station. The back of the ...
Photograph of plots 4, 5, 6, and 7 on the Red Plains Conservation Experiment Station. The back of th...
Photograph of two UNIDENTIFED men, located in the background, standing next to one of the control pl...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of a control plot, Red Plains Experiment station. Average annual soil loss from the Bermu...
The Oklahoma Agricultural Experiment Station periodically issues revisions to its publications. The ...
Photograph of soil profiles of Vernon and Kirkland soils, both virgin and eroded. From the Red Plain...
Photograph of soil profiles of Vernon and Kirkland soils, both virgin and eroded. From the Red Plain...
The Oklahoma Agricultural Experiment Station periodically issues revisions to its publications. The ...
Photograph of the Red Plains Experiment Station, Guthrie, OK. Vernon fine sandy loam, lower B horizo...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...
Photograph of plots 8, 9, and 10 on the Red Plains Conservation Experiment Station. The back of the ...
Photograph of plots 4, 5, 6, and 7 on the Red Plains Conservation Experiment Station. The back of th...
Photograph of two UNIDENTIFED men, located in the background, standing next to one of the control pl...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plai...
Photograph of a control plot, Red Plains Experiment station. Average annual soil loss from the Bermu...
The Oklahoma Agricultural Experiment Station periodically issues revisions to its publications. The ...
Photograph of soil profiles of Vernon and Kirkland soils, both virgin and eroded. From the Red Plain...
Photograph of soil profiles of Vernon and Kirkland soils, both virgin and eroded. From the Red Plain...
The Oklahoma Agricultural Experiment Station periodically issues revisions to its publications. The ...
Photograph of the Red Plains Experiment Station, Guthrie, OK. Vernon fine sandy loam, lower B horizo...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...
Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2...