Photograph of Plot 186 range cover evaluation in controlling soil splash. The back of the photograph proclaims, "Range cover evaluation on plot 186, if sand dropseed on Rolling Red Plains deep heavy upland in poor condition, was 49% effective in controlling soil splash. The ruler inserted beneath the cover shows that 42% of the ground surface is shielded by forage and litter.”

Photograph of a portable irrigation system watering abbruzzi rye on a dam. Detention reservoir # 2. OK-10-345.

Photograph of lightly used sideoats grass cover on the very shallow phase of the red shale hills site in the Rolling Red Plains, which is in excellent condition. The back of the photograph proclaims, "Cover on the very shallow phase of the red shale hills (Soils Unit 24) site in the Rolling Red Plains is sparse even in excellent condition. If the range has been grazed closely in past years, so that there is no accumulation of litter on the ground, there is room between the plants for raindrops to strike the soil directly. This photo shows lightly used side oats [sic] grass on the site."

Photograph of Plot 172 range cover evaluation. The back of the photograph proclaims, "Soil coverage is measured on a vertical photograph of a sample of cover showing a white ruler inserted beneath the forage and litter. On this photograph of range cover evaluation plot 172, 40% of the ruler is obsured [sic] by the cover."

Photograph of soil erosion on very shallow phase of red shale hills site in Rolling Red Plains taking place. A ruler sits next to a tussock of blue grama showing extent of erosion. The back of the photograph proclaims, "A tussock of blue grama 4 inches high shows extent of erosion that has taken place on very shallow phase of red shale hills site (Soil Unit 2x) in Rolling Red Plains. All the topsoil has been removed, exposing the shale parent material."

Photograph of a field of sweetclover overseeded in wheat stubble. The back of the photograph proclaims, "Field of sweet clover overseeded in wheat stubble. Will go to seed – then will be followed by wheat. C-3-E erosion – No evidence of plowpan – yield satisfactory. Clover has been used for a number of years. Roots were growing straight down in the normal way. See Okla-10-285."

Photograph of a field of varying topography on the red shale of the Rolling Red Plains. The back of the photograph proclaims, "The red shale hills site of the Rolling Red Plains is a complex of very shallow soils on the hilltops and steep slopes, shallow soils on the gentler slopes, and deep colluvial soils in the narrow draws. The climax vegetation of the shallow and very shallow soils is mixed prairie."

Photograph of a close up shot of roots from first year clover on a failing field located on Norman Farm. The back of the photograph proclaims, "This field was failing; yields were low; the land was tight although rated as a medium textured soil. This excavation was made on one of the thin areas. The roots were growing out laterally. This was the first year of clover. See Okla-10-286."

Photograph of Plot 164 range cover evaluation of sideoats grama cover in controlling soil splash on red shale hills site. The back of the photograph proclaims, "Range cover evaluation plot 164 in excellent condition range on red shale hill site (soil unit 24-RR) had 4518 lb. sideoats grama cover per acre and was 97% effective in controlling soil splash. Detachability was 32% and splash amounted to 1,248 lb. per acre."

Photograph of Plot 173 range cover evaluation of three-awn cover in controlling soil splash on red shale hills site. The back of the photograph proclaims, "Range cover evaluation on plot 173, in poor condition range on red Shale hills site (soil unit 24-RR) had 1288 lb. threeawn cover per acre, which was 48% effective in control soil splash. Detachability was 28% and splash amounted to 17,869 lb. per acre."

Photograph of a Red Shale hills site (soil unit 24-RR) in excellent condition. A shovel is in the foreground of this photograph. The back of the photograph proclaims, "Red Shale hills site (soil unit 24-RR) in excellent condition. Sideoats grama and hairy grama plots in this area were 97-98% effective in preventing soil splash."

Photograph of a red shale hills site in poor condition. The back of the photograph proclaims, "Red shale hills site (soil unit 24-RR) in poor condition, cover mainly of threeawn and weeds amounting to 1800 lb. per acre. The grass clumps are conspiouously [sic] tussocked by erosion of the exposed areas between."

Photograph of plot 184 Range cover evaluation of buffalograss cover in controlling soil splash on red shale hills site. The back of the photograph proclaims, "Range cover evaluation plot 184 of buffalograss was 91% effective in reducing soil splash on heavy deep uplands of the Rolling Red Plains. In held 33% of 1.93 inches of water applied in 20 minutes. The plot had 1,408 pounds of cover per acre, providing 77% soils coverage."

Photograph of a close up shot of roots from first year clover on a failing field located on Norman Farm. The back of the photograph proclaims, "This field was failing; yields were low; the land was tight although rated as a medium textured soil. This excavation was made on one of the thin areas. The roots were growing out laterally. This was the first year of clover. See Okla-10-286."

Photograph of raindrop applicator in operation on red shale hills stie of Rolling Red Plains.

Photograph of the Red Shale Hills site (soil unit 24-RR) in poor condition, cover mainly of threeawn and weeds amounting to 1800 lb. per acre. The grass clumps are conspicuously tussocked by erosion of the exposed areas between.

Photograph of rancher Pat Higgins holding runners of Angleton grass growing in rod rows. TX-46, 393.

Photograph of an infiltrometer built by the Soil Conservation Service scientist A. D. Bull. Here he checks it for proper adjustment as recording starts. Picture # 5 of a series. TX-46, 266-E.

Photograph of an infiltrometer built by the Soil Conservation Service scientist A. D. Bull. The floats are being placed within the rings. Picture # 2 in a series. TX-46, 266-B.

Photograph of an infiltrometer built by the Soil Conservation Service scientist A. D. Bull. Water-holding rings are in place. One picture of a series. TX-46, 266-A.

Photograph of an infiltrometer built by the Soil Conservation Service scientist A. D. Bull. The device is completely set up. The recorder is on the left. The water supply drum is on the right. Rings, floats and water on the lower right. Picture # 4 in a series. TX-46, 266-D.

Photograph of range cover evaluation plot # 164, in excellent condition. Range on red shale hills site (soil unit 24-RR) had 4528 pounds of sideoats grama grass cover per acre, which was 97% effective in controlling soil splash. Detectability was 32% and the splash itself amounted to 1,248 pounds per acre. OK-10-634.

Photograph of range cover evaluation plot # 173, in poor condition. Range on red shale hills site (soil unit 24-RR) had 1288 pounds of threeawn grass cover per acre, which was 48% effective in controlling soil splash. Detectability was 28% and the splash itself amounted to 17,869 pounds per acre. OK-10-632.

Photograph of Infiltrometer built by Soil Conservationist Service [SCS] scientist, A.D. Bull. SCS technicians examine the recording instrument. No. 3 of a series.