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Aqueous ammonia as a nitrogen fertilizer for summer cauliflowers, compared with ammonium nitrate (broadcast) and urea (broadcast and injected)

Published online by Cambridge University Press:  27 March 2009

E. R. Page
E. R. Page
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick CV35 9EF
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Extract

As a nitrogen fertilizer for vegetable production in Britain ammonia has been used mainly for bruasels sprouts (Page, Tatham & Wood, 1974; Page, 1975a; Page, Wood & Case, 1976), and leeks (Page & Williams, 1977). These crops with long growing seasons allow considerable latitude in time of application of the ammonia. Summer and autumn maturing cauliflowers have not only a short growing season, but also have a physiological control of curd formation which appears to be insensitive to nitrogen supply (Salter, 1969; Salter & Fradgley, 1969). They are also usually transplanted into the field, and the root system is therefore restricted for at least part of the growing season. It is therefore desirable to know if the roots would reach the injected nitrogen in time, as, until the ammonia becomes nitrified, nitrogen movement in the soil is small (Page, 19756). Thus, time of application of the ammonia was considered likely to be important.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 251 - 254
Copyright
Copyright © Cambridge University Press 1979

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References

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