Apparatus for measuring change in the potato soil bed profile and relationship of change to soil density and air permeability J. C. BishopH. TimmJ. W. Perdue OriginalPaper Pages: 311 - 317
Variability for photoperiodic reaction among diploid and tetraploid potato clones from three taxonomic groups H. A. MendozaF. L. Haynes OriginalPaper Pages: 319 - 332
Report of committee on PVX testing N. S. WrightJ. E. CochranJ. Munro News and Reviews Pages: 333 - 335
A variable row-width fertilizer-banding machine for use in population-density studies R. JungR. G. Rowberry News and Reviews Pages: 337 - 341