1. The Netherlands Plant Breeder's Decree

   • H. de Haan

   OriginalPaper Pages: 1 - 4

2. Shortening the breeding-cycle

   • S. J. Wellensiek

   OriginalPaper Pages: 5 - 10

3. Organoleptic research in the interests of Horticultural Plant Breeding

   • Frieda Garretsen

   OriginalPaper Pages: 11 - 18

4. Notes on the genetics of a few leaf characters in the genus citrus

   • H. Toxopeus

   OriginalPaper Pages: 19 - 25

5. Introgression in certain wild potato species

   • J. G. Hawkes

   OriginalPaper Pages: 26 - 35

6. Cold requirements of witloof chicory varieties (Cichorium intybus L.) as a yield-determining factor

   • J. A. Huyskes

   OriginalPaper Pages: 36 - 41

7. Identification of R-genes in Solanum stoloniferum

   • R. K. McKee

   OriginalPaper Pages: 42 - 46

8. Investigations preliminary to the production of cultivars of Andropogon gayanus

   • W. H. Foster

   OriginalPaper Pages: 47 - 52

9. How long do honey-bees carry germinable pollen on them?

   • A. Kraai

   OriginalPaper Pages: 53 - 56

10. Outstanding performance of potato variety ‘Ultimus’ in West Pakistan

    OriginalPaper Pages: 57 - 60

11. Species crosses in the genus Corchorus (jute plants)

    • S. D. Chaudhuri
    • A. Jabbar Mia

    OriginalPaper Pages: 61 - 64

12. Problems in breeding and cytology of sugar cane

    • G. Bremer

    OriginalPaper Pages: 65 - 80

13. Factors affecting seed set in cross-pollinations of green-sprouting broccoli (Brassica oleracea var. Italica)

    • Franklin W. Martin

    OriginalPaper Pages: 81 - 86

14. The cost of Euphytica

    • H. De Haan

    OriginalPaper Pages: 87 - 94

15. Theoretical studies on the methodological procedures of radiation breeding

    • Yoshio Yoshida

    OriginalPaper Pages: 95 - 111

16. Reviews of books

    BookReview Pages: 112 - 114

17. Notes

    Announcement Pages: 114 - 114