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Nitrogen studies in a coffee soil III. The comparative efficiency of ammonium sulphate and urea fertilizers in the presence and absence of an organic mulch measured in terms of crop yield

Published online by Cambridge University Press:  27 March 2009

J. B. D. Robinson
Affiliation:
Coffee Services, Department of Agriculture, Kenya

Extract

The work reported in two previous papers, Robinson (1960a, b) led to certain conclusions which required evaluation in terms of coffee yields (Coffee arabica Linn). The work describes changes in nitrate and ammonia-N in the Kikuyu red loam coffee topsoil, both natural and fertilizer derived, in the presence and absence of mulches.

This paper presents early coffee yield results which have been obtained from field trials laid down on the Coffee Research Station, Ruiru, Kenya, to measure the effect of treatments based on the conclusions drawn from the soil studies.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1961

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References

Jones, P. A., Robinson, J. B. D. & Wallis, J. A. N. (1960). Emp. J. Exp. Agric. (in the Press).Google Scholar
Pereira, H. C. & Jones, P. A. (1954). Emp. J. Exp. Agric. 22, 23.Google Scholar
Robinson, J. B. D. (1960 a). J. Agric. Sci. (in the Press).Google Scholar
Robinson, J. B. D. (1960 b). J. Agric. Sci. (in the Press).Google Scholar

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Nitrogen studies in a coffee soil III. The comparative efficiency of ammonium sulphate and urea fertilizers in the presence and absence of an organic mulch measured in terms of crop yield
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