1. Markers for maturity and senescence in the potato crop

   • D. K. L. Mackerron
   • H. V. Davies

   OriginalPaper Pages: 427 - 436

2. Double cropping of potatoes in a semi-arid environment: the association of ground cover with tuber yields

   • D. Levy
   • L. Livesku
   • D. E. Van Der Zaag

   OriginalPaper Pages: 437 - 449

3. Isolation, culture, and regeneration of leaf mesophyll protoplasts of selected clones ofSolanum

   • Sharon Radke
   • P. Grun

   OriginalPaper Pages: 451 - 462

4. An econometric demand model of the U.S. potato market

   • Roger K. Conway
   • Michael Stellmacher
   • Wynnice Napper

   OriginalPaper Pages: 463 - 476

5. Size grading methods and their relationship to the dimensions, mass and volume characteristics of potato cultivars

   • D. C. McRae
   • C. A. Glasbey
   • J. Fleming

   OriginalPaper Pages: 477 - 486

6. Effects of droght on the initiation, yeild, and size distribution of tubers ofSolanum tuberosum L. cv. Bintje

   • P. C. Struik
   • G. Van Voorst

   OriginalPaper Pages: 487 - 500

7. Züchtung und potentielle Nutzung extrem frühreifer Kartoffelsorten

   • Ch. Pfeffer
   • P. Kluth
   • B. Trognitz

   OriginalPaper Pages: 501 - 508

8. Assessment of the non-freezing cold sensitivity of wild and cultivated potato genotypes by chlorophyll fluorescence analysis

   • J. A. Greaves
   • J. M. Wilson

   OriginalPaper Pages: 509 - 520

9. The relationship between temperature and sprout growth in stored seed potatoes

   • E. McGee
   • M. C. Jarvis
   • H. J. Duncan

   Short Communication Pages: 521 - 524

10. Effect of additive and carrier type on potato sprout suppression by dust formulations of tecnazene

    • M. O. Oladimeji
    • N. H. Stephen
    • H. J. Ducan

    Short Communication Pages: 525 - 528

11. Conversion coefficients between intercepted solar radiation and tuber yeilds of potato crops under tropical highland conditions

    • A. J. Haverkort
    • P. M. Harris

    Short Communication Pages: 529 - 533

12. ELISA-Virusnachweis an Keimen von Knollen ohne Rindite-Vorbehandlung

    • M. Munzert
    • R. Heinlein

    Short Communication Pages: 535 - 540

13. The potential demand for seed potatoes: a world perspective

    • D. E. Van Der Zaag

    Topics of General Interest Pages: 541 - 548

14. Response of potato cell cultures to aluminium and selection of tolerant cell lines

    • G. Wersuhn
    • H. H. Nhi
    • T. Börner

    Erratum Pages: 549 - 549

15. Review

    • D. E. van der Zaag

    ReviewPaper Pages: 550 - 550

16. News

    News Pages: 551 - 552

17. Council notices

    Association News Pages: 553 - 560