Photograph of stubble mulch tillage on the contour with impounding type terraces. The wheat stubble was left on the groundto control wind erosion, increase water intake of the soil and to add organic matter to the surface soil.

Photograph of stubble mulch tillage on the contour with impounding type terraces. The wheat stubble was left on the ground to control wind erosion, increase water intake of the soil and to add organic matter to the surface soil.

Photograph of bindweed area at the edge of a wheat field. This area is uncontrolled and is in excellent condition. It is in a low spot where it received enough moisture to encourage growth. If not contolled it will spread rapidly into the ajoining wheat field and cause much damage to the wheat. It is resistant to poisons and can be controlled only by constant tillage. It will kill out other vegetation as it increases.

Photograph of a close-up of stubble mulch tillage on the contour with impounding type terraces. The wheat stubble was left on the ground to control wind erosion, increase water intake of the soil and to add organic matter to the surface of the soil.

Photograph of peanuts and grain sorghum strip cropped, 8 x 8 in rows. OK-128-10.

Photograph of bindweed control. A close-up of bindweed area in a wheat field sprayed with 2,4,5-T herbicide in the spring of 1956 only partially killed. This weed spreads very rapidly and can cover large areas in a short amount of time if not controlled. It is resistant to poisons and needs constant tillage. It will kill out other vegetation as it increases. OK-353-12.

Photograph of Bindweed. Close up of bindweed area at the edge of a wheat field. This area is uncontrolled and is in excellent condition. It is in a low spot where it receives enough moisture to encourage growth. If not controlled it will spread rapidly into the adjoining wheat field and cause much damage to the wheat. It is resistant to poisons and can be controlled only by constant tillage. It will kill out other vegetation as it increases. OK-354-2.

Photograph of bindweed control. A close-up of bindweed area in a wheat field sprayed with 2,4,5-T herbicide in the spring of 1956 only partially killed. This weed spreads very rapidly and can cover large areas in a short amount of time if not controlled. It is resistant to poisons and needs constant tillage. It will kill out other vegetation as it increases. OK-353-12.

Photograph of N.H. Thurman looks across 9-acre field of Indiangrass he seeded in 1947. Thurman has seeded 100 acres of grass as a result of experiments he witnessed on LU project. He leases government grazing land in addition to his own native grassland.

Photograph of peanuts and grain sorghum strip cropped, 8 x 8 in rows.

Photograph of a close-up shot of a partially killed bindweed plant area in a wheat field sprayed with 2-4-5T in the spring of 1956. The back of the photograph proclaims, "Close-up of bindweed area in wheat field sprayed with 2-4-5T in the spring of 1956 received only partial kill. This weed is a very rapid spreader and will cover large areas in a short time if it is not controlled. It is resistant to poisons and needs constant tillage. It will kill out other vegetation as it increases."

Photograph of a partially killed bindweed plant spot in a wheat field sprayed with 2-4-5T in the spring of 1956. The back of the photograph proclaims, "Bindweed spot in wheatfield [sic] sprayed with 2-4-5T in the spring of 1956 received only partial kill. This weed is a very rapid spreader and will cover large areas in a short time if it is not controlled. It is resistant to poisons and needs constant tillage. It will kill out other vegetation as it increases."

Photograph of a close-up shot of a bindweed plant area at the edge of a wheat field. The back of the photograph proclaims, "Close-up of bindweed area at the edge of a wheat field. This area is uncontrolled and is in excellent condition. It is in a low spot where it receives enough moisture to encourage growth. If not controlled it will spread rapidly into the adjoining wheat field and cause much damage to the wheat. It is resistant to poisons and needs constant tillage. It will kill out other vegetation as it increases."

Photograph of "Two samples of a soil showing the deterioration that [took] place if the cropping system consists mainly of soil-depleting crops. The soil on the left has been used to grow soil-depleting crops year after year over a long period of time. The sample on the right was taken from an area where the soil has been rotated with soil improving crops part of the time."

Photograph of a &Xdp-BC Eldorado cherty silt loam showing fire damage to a native grass meadow. Foreground has been burned, background shows hay that would have been hauled from the field if fire hadn't took it's toll. OK-1422-3.