Photograph of a .71-mile single field drain built in 1957 that drains 60 acres of cropland. The back of the photograph proclaims, "Single field drain built 1957. Drains 60 acres of cropland. It is .71 mile long. Shows good shaping and spoil spreading with farm equipment."

Photograph of 40 acres of sweetclover in rotation on 1195 acres cropland.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat - 30 acres.

Photograph of disking down oats, peas, vetch ahead of plow to accomplish the practice o plowing down a green manure crop in a wheat conservation crop rotation on 30 acres.

Photograph of a UNIDENTIFED man on a tractor plowing down oats, Austrian peas, and vetch as part of a conservation crop rotation with wheat on a 30-acre field. The back of the photograph proclaims, "Plowing down oats, Austrian peas, and vetch in a conservation crop rotation with wheat – 30 acres."

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat-30 acres.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat - 30 acres.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat-30 acres.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat-30 acres.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat-30 acres.

Photograph of plowing down oats, Austrian peas, and vetch in a conservaton crop rotation with wheat - 30 acres.

Photograph of conservation crop rotation. Plowing down oats, Austrian winter peas and vetch in a conservation crop rotation with wheat—30 acres. OK-687-5.

Photograph of a herd of 112 cattle grazing on a pasture consisting of Blackwell switchgrass and sweetclover planted on 75 acres of land. The back of the photograph proclaims, “Conservation Rotation Hay & Pasture. Blackwell Switchgrass. Mr. Brown planted a mixture of 3 lbs. Blackwell Switchgrass and 2 lbs. Sweet clover March 1957 on 75 acres of Class III land. On Mar. 1 he started grazing 80 head of steers in this field and grazed until May 20. Returned the 80 head to graze July 15 to Oct. 25 or total of 182 days total gain 28, 500 lbs. This shows same field July 2, 1959 with 96 big cattle and 16 calves have been grazing since June 1. Brown plans to graze until Aug. 1 then rest to get good regrowth and will return [the] Oct. 1 until sold.”

Photograph of stubble being disked following combine. This photo shows second operation plowing stubble into the top 6" of the soil.

Photograph of stubble being disked following combine. This photo shows second operation plowing stubble into the top 6" of the soil.

Photograph of stubble being disked following combine. This photo shows second operation plowing stubble into the top 6" of the soil.

Photograph of the Deep Sand Site. Reseeding native grass mixture in 1958.