Photograph of a drawdown pipe and drain valve in an irrigation resevoir constructed under the Great Plains Conservation Program. OK-1712-2.

Photograph of a valve and entrance pipe installed in a dam built as an irrigation reservoir under the Great Plains Conservation Program. OK-1712-3.

Photograph of contour blanklisted furrows in the foreground which are not only protecting this field but are collecting soil blowing from the unprotected field in the background. The angle which the closest man is leaning into the wind indicates its velocity. OK-5466.

Photograph of wind carrying silt on a clean, cultivated field. Notice how the wind picks up the soil and carries it higher the farther it goes. Also notice that the soil is not picked up until the wind has a chance to gather momentum close to the ground. The soil in the foreground is not being carried as the end of the field is near, and the fence and vagetation act as a windbreak. This wind erosion is aserious problem in western Oklahoma, Kansas and Southwestern Nebraska. OK-5123.

Photograph of a "View of contour listing between terraces for row crop planting."

Photograph of contour furrows in pasture land in order to control and preserve water as precipitation falls. Results have proven that this is one way to develop a good pasture. OK-5011.