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The residual effect of phosphate and potash fertilizers applied to cut or grazed grassland

Published online by Cambridge University Press:  27 March 2009

J. S. Brockman ,
P. G. Shaw  and
K. M. Wolton
J. S. Brockman
Affiliation:
Fisons Limited – Fertilizer Division, North Wyke Experimental Station, Okehampton, Devon
P. G. Shaw
Affiliation:
Fisons Limited – Fertilizer Division, North Wyke Experimental Station, Okehampton, Devon
K. M. Wolton
Affiliation:
Fisons Limited – Fertilizer Division, North Wyke Experimental Station, Okehampton, Devon
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Summary

P and K fertilizers were applied over a 5-year period to plots that were either cut, individually grazed or communally grazed. Residual effects were assessed in the sixth year when the sward was ploughed and sown with Italian ryegrass. The residual study supported the earlier published inference that (a) P returned to the sward in sheep dung is not an effective P source under field conditions, (b) communal grazing can lead to appreciable transfer of K from one plot to another.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 76 , Issue 3 , June 1971 , pp. 387 - 389
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Brockman, J. S., Shaw, P. G. & Wolton, K. M. (1970). The effect of phosphate and potash fertilizers on cut and grazed grassland. J. agric. Sci., Camb. 74, 397–407.CrossRefGoogle Scholar
Gunary, D. 1968. The availability of phosphate in sheep dung. J. agric. Sci., Camb. 70, 33–38.CrossRefGoogle Scholar