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An experiment measuring effects of N, P and K fertilizers on yield and N, P and K contents of grazed grass

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. An experiment was started in 1959 to measure effects on grazed permanent grass of ammonium sulphate, calcium nitrate, superphosphate and muriate of potash; yields and N, P and K contents of the herbage were measured from 1961 to 1964.

2. Applying 1.5 cwt. N/acre per year (in four bi-monthly doses) consistently increased yields. The first and fourth cuttings yielded less with 3.0 cwt. N/acre per year (also in four bi-monthly doses) than with 1.5 cwt. N/acre, but the second and third cuttings yielded more; the total additional yield from 3.0 cwt. N was small. Yields were increased equally by ammonium sulphate (providing that lime was also applied) and calcium nitrate.

3. Yields were increased more by P than by K; the increase from P was greater when N was also applied.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 67 , Issue 1 , August 1966 , pp. 121 - 128
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Davies, W. (1952). The Grass Crop; its Development, Use and Maintenance, 1st ed.London: SPON.Google Scholar
Dyke, G. V. (1964). Exp. Husb. 10, 101.Google Scholar
Giöbel, G. (1953). Växt-närings-Nytt, 3, 1.Google Scholar
Mudd, C. H. & Meadowcroft, S. C. (1964). Exp. Husb. 10, 66.Google Scholar