PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

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Record number 104589
Title De invloed van onderzoek op de ontwikkeling van de teelt van uien en sjalotten
show extra info.
door Carolus Wilhelmus Cornelis van Beekom
Author(s) Beekom, C.W.C. van
Publisher 's-Gravenhage : Staatsdrukkerij
Publication year 1952
Description 132 p.
Notes Proefschrift Wageningen
Tutors Wellensiek, Prof. Dr. Ir. S.J.
Graduation date 1952-02-07
Dissertation no. 169
Author abstract show abstract
After having reviewed the international history of the genus Allium and the economic importance of the onion crop in the Netherlands the author described and compared the situations before and after a 12 years' period (1939-1951) of research on onions and shallots. In this period research was started on practical problems on choice of variety, manuring, cultural methods, control of diseases, and storage.

This period of 12 years saw an increase in productivity of 6% of the onion selections, an economy of N fertilizer and a yield increase of 2.5 % by correct rates of N. Labour and seed were saved and crop care was better by sowing in rows instead of broadcast.

There was much less infestation by yellow dwarf of the onion seed crop and shallot crop and onion maggot was under control. Storage losses were limited by preventing frost injury. Growing of onions from sets was entirely a result of research.

Finally prospects were outlined on choice of variety, mechanization and storage. Future activities of the Netherlands Onion Federation were forecast.

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Keyword(s) allium cepa / onions / allium ascalonicum / shallots
Categories Root Vegetables
Publication type PhD thesis
Language Dutch; Flemish
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