Crop rotation tillage and fertility experiments at the Lawton(okla) field station, 1917-49.
Osborn,W.M.
Crop rotation tillage and fertility experiments at the Lawton(okla) field station, 1917-49. - Washington U.S. Dept. of Agriculture. 1955 - 58
633
Crop rotation tillage and fertility experiments at the Lawton(okla) field station, 1917-49. - Washington U.S. Dept. of Agriculture. 1955 - 58
633