Morphological characters considered as an indication of physiological age ofSolanum tuberosum plants cultivated in different ecological localities Piera Scaramella Petri Articles Pages: 153 - 164
Decapitation and genetic markers as related to haploidy inSolanum tuberosum S. J. PeloquinR. W. Hougas Articles Pages: 176 - 183
Population studies and successful control of the potato root eelworm John Grainger Articles Pages: 184 - 198
Über Die Bestimmung des Krautziehoder Frührodetermins Durch Blattlauskontrollen K. NeitzelChr. Pfeffer Articles Pages: 199 - 222