Photograph of the Belle Fourche River in South Dakota, USA in the early 20th century.

Photograph of a herd of cattle in a field near the area of the Belle Fourche Irrigation project in Newell, South Dakota, USA in the early 20th century.

Photograph of a fat-rumped Rambouillet lamb standing in a sheep pen in the early/mid 20th century. According to the text beneath the image, the lamb was produced at the South Dakota Research Station as an experiment to breed sheep that would flourish in deep snow and it continues by describing the characteristics of the lamb.

Photograph of a pure-bred Rambouillet ewe owned by the South Dakota Agricultural Experiment Station in the early/mid 20th century. The text beneath the image describes the characteristics of the Rambouillet sheep.

Photograph of a pure-bred fat-rumped ram from Siberia that was owned by the South Dakota Agricultural Experiment Station which was used to sire a new breed of sheep that could better withstand the cold in the early/mid 20th century.