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The value of mid-season top-dressings of nitrogen fertilizer for main-crop potatoes

Published online by Cambridge University Press:  27 March 2009

G. W. Cooke ,
F. V. Widdowson  and
J. C. Wilcox
G. W. Cooke
Affiliation:
Chemistry Department, Rothamsted Experimental Station, Harpenden, Herts
F. V. Widdowson
Affiliation:
Chemistry Department, Rothamsted Experimental Station, Harpenden, Herts
J. C. Wilcox
Affiliation:
Chemistry Department, Rothamsted Experimental Station, Harpenden, Herts
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Extract

Twenty-one field experiments were carried out from 1953 to 1955 on main-crop potatoes to compare dressings of nitrogen applied wholly to the seedbed (as ammonium sulphate), with equivalent dressings applied partly to the seedbed (as ammonium sulphate) and partly as a top-dressing (of ‘Nitro-Chalk’) just before the final ridges were set up.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 49 , Issue 1 , May 1957 , pp. 81 - 87
Copyright
Copyright © Cambridge University Press 1957

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References

REFERENCES

Brasher, E. P. (1941). Amer. Potato J. 18, 81.CrossRefGoogle Scholar
Emilsson, B. (1955). Växt-närings-Nytt, 11, 6, 12.Google Scholar
Emmert, E. M.(1949). Bull. Ky Agric. Exp. Sta. no. 529.Google Scholar
Hawkins, A. (1946). J. Amer. Soc. Agron. 38, 667.CrossRefGoogle Scholar