Photograph of the Amarillo Experiment Station in Bushland, Texas. Cooperator: Research. A close-up of Noble cultivator showing type of blade used to undercut weeds and stubble, yet leaving all trash on the ground surface.

Photograph of the Amarillo Experiment Station in Bushland, Texas. Cooperator: Research. A close-up of Noble cultivator showing type of blade used to undercut weeds and stubble, yet leaving all trash on the ground surface.

Photograph showing a rear view of a 30 inch sweep machine. This machine is a Dampster No. 101 which has been worked over by the station. The sweeps are Ra-dex made by I. F. Reed at the Alabama machinery laboratory. TX-45, 883.

Photograph of the rear view of a Dampster No. 101 thirty-inch sweep machine on the Amarillo Experiment Station. The back of the photograph states, "The rear view of a 30" sweep machine out of ground. This machine is a Dampster No. 101, which has been worked over by the station. The sweeps are Ra-dex, made by I. F. Reed, at the Alabama machinery laboratory."

Photograph of the appearance of delayed subtilled fallow plot immediately after the first cultivation. 3300 pounds of surface residue per acre, 56% of the original. TX-R-4, 1778.

Photograph of the appearance of subtilled fallow field, G-7, of the Amarillo Experiment Station, after three fall cultivations. TX-R-4, 1753.

Photograph of the appearance of subtilled fallow plot after four cultivations. Plot SM 6. 3500 pounds of surface residue per acre, 57% of the original. TX-R-4, 1781.