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Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops and permanent grass III. Yields 1961–1965

Published online by Cambridge University Press:  27 March 2009

F. V. Widdowson  and
A. Penny
F. V. Widdowson
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
A. Penny
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Summary

An experiment begun in 1956 and using a five-course rotation of barley, grass-clover ley, potatoes, wheat and kale and a block of permanent grass was continued.

N decreased yields of the rotation ley, slightly increased yields of potatoes (after the ley), but greatly increased yields of wheat, barley and kale and permanent grass. P increased the yields of all arable crops, of kale dramatically, but not of permanent grass. K greatly increased yields of wheat and the rotation ley and even more of potatoes, but it increased yields of barley, kale and permanent grass little.

F.Y.M. increased the yields of all crops; potatoes responded most. Applying fertilizers with the F.Y.M. diminished its effects, but except for wheat and barley grain a combination of the two produced the largest yields.

Mean yields from all combinations of N, P and K were a little smaller between 1961 and 1965 than between 1956 and 1960, and the yields were maintained best by applying F.Y.M. and fertilizers together. Responses to N and to K were similar in both rotations, but responses to P became larger with time.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 1 , February 1968 , pp. 53 - 58
Copyright
Copyright © Cambridge University Press 1968

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References

REFERENCES

Widdowson, F. V., Penny, A. & Cooke, G. W. (1963). Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops. I. Yields. J. agric. Sci., Camb. 60, 347.CrossRefGoogle Scholar
Williams, R. J. B., Cooke, G. W. & Widdowson, F. V. (1963). II. Nutrients removed by crops. J. agric. Sci., Camb. 60, 353.CrossRefGoogle Scholar