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Autumn nitrogen for winter wheat

Published online by Cambridge University Press:  27 March 2009

F. V. Widdowson ,
A. Penny  and
R. J. B. Williams
F. V. Widdowson
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
A. Penny
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
R. J. B. Williams
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Extract

1. Fourteen experiments with winter wheat on heavy-land farms from 1958–60 compared autumn dressings of sulphate of ammonia with equivalent early (March) or late (May) spring top-dressings. Dressings applied on two or all three dates of application were also compared.

2. Consistent and significant gains in yield from low (0·5 or 0·6 cwt. N/acre) and high (1·0 or 1·2 cwt. N/acre) levels were obtained at most centres, which were on fields under arable rotation.

3. With the low level of N, gains in yield were greatest from a single May top-dressing. There was no gain from dividing the dressing.

4. With the high level of N, dressings divided between autumn-May or March-May were best. March-May was the most consistently satisfactory treatment and gave the highest mean increases in yield in 1959 and 1960, but in 1958 autumn-May was better. Single May dressings gave slightly lower yields. There was no advantage from dividing N between all three dates of application.

5. Single applications of N in autumn gave lower yields than single applications in spring; supplementing autumn N with a late spring top-dressing gave almost the same yield as giving all the N in spring. Dividing the dressing in this way may be convenient on many heavy-land farms.

6. The percentage of N in the grain was highest with a late top-dressing of fertilizer-N, lowest with autumn N and intermediate with March top-dressings.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 57 , Issue 3 , November 1961 , pp. 329 - 334
Copyright
Copyright © Cambridge University Press 1961

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References

REFERENCES

Bullen, E. R. & Lessells, W. J. (1957). J. Agric. Sci. 49, 319.Google Scholar
Church, B. M. (1956). J. Sci. Fd Agric. 11, 711.Google Scholar
Cowie, G. A. (1940). J. Minist. Agric. 47, 107.Google Scholar
Cowie, G. A. (1948). Chem. Ind., p. 211.Google Scholar
Widdowson, F. V. (1959). J. Agric. Sci. 53, 17.CrossRefGoogle Scholar