Crop rotation and tilage experiments at the north platte(Nebr.) substation: 1907
Zook, L.L., Weakly, H.E.
Crop rotation and tilage experiments at the north platte(Nebr.) substation: 1907 - Washington 1950 - 1-78 p. - United States Department of A .
Crop rotation and tilage experiments at the north platte(Nebr.) substation: 1907 - Washington 1950 - 1-78 p. - United States Department of A .