Photograph of the Red Plains Experiment Station, Guthrie, OK. East farm gully control studies. 4 1/2 miles south of Guthrie, OK. Clumps or pedestals of soil held from ending by bluestream grass. OK-6915.

Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plains Conservation Experiment Station. The back of the photograph proclaims, "Harley A. Daniel, Project Supervisor, taking a soil sample on Plot No. 3, which is continuous cotton, on Stevensville Fine Sandy Loam."

Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plains Conservation Experiment Station. The back of the photograph proclaims, "Harley A. Daniel, Project Supervisor, taking a soil sample on Plot No. 5 which is one of the rotation plots. Cotton, wheat and sweet clover, Stevensville Fine Sandy Loam."

Photograph of two UNIDENTIFED men, located in the background, standing next to one of the control plots established in 1929 to record soil and water losses from different kinds of cover and cropping systems. The back of the photograph proclaims, “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. (See USDA T-837 for full details on these plots.)"

Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plains Conservation Experiment Station. The back of the photograph proclaims, "Harley A. Daniel, Project Supervisor, taking a soil sample on Plot No. 9. This is the de-surfaced plot with continuous cotton, on Stevensville Fine Sandy Loam."

Photograph of Harley A. Daniel, Project Supervisor, taking a soil sample from a plot on the Red Plains Conservation Experiment Station. The back of the photograph proclaims, "Harley A. Daniel, Project Supervisor, taking a soil sample on Plot No. 7 which is in permanent Bermuda Grass cover, On Stevensville Fine Sandy Loam."

Photograph of the H.C. Wright Farm with a John Bean power sprayer equipped to make basal bark applications on brush and trees. The person shown is Harry M. Elwell, Research Agronomist for Field Crop Research, USDA, located at the Red Plains Conservation Experiment Station, Guthrie, Oklahoma. OK-11-10.

Photograph of steers on a cleared and controlled area of the East farm. Note the area to the right in an uncontrolled scrubby oak growth. Steers placed on the pasture on May 1, 1941. OK-8712.