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Effects of Environment and Cultural Conditions on Potassium, Calcium and Magnesium in Coffee Leaves

Published online by Cambridge University Press:  03 October 2008

J. B. D. Robinson
J. B. D. Robinson
Affiliation:
East African Agriculture and Forestry Research Organization, P.O. Box 30148, Nairobi, Kenya
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Summary

Potassium, calcium and magnesium in coffee leaves are presented as total K + Ca + Mg in dry matter and as percentages (proportions) of this sum. Brazilian coffee and leaf samples collected in different parts of Kenya generally fell within the normal ranges of values reported from the Kivu area in the Congo Republic. Data for Kenya coffee leaves are examined for the influence of season, cultural treatments such as organic mulch and fertilizers, and cropping level, on the concentration and balance of the nutrients.

Type
Research Article
Information
Experimental Agriculture , Volume 5 , Issue 4 , October 1969 , pp. 311 - 326
Copyright
Copyright © Cambridge University Press 1969

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References

Anonymous (1961). An Atlas of Coffee Pests and Diseases. Nairobi: Coffee Board of Kenya, 32.Google Scholar
Beckley, V. A. (1935). Emp. J. Expl Agric. 3, 203.Google Scholar
Cain, J. C., Jacob, W. C., Reuther, W., Seeley, J. G., Shear, C. B. & Potter, G. F. (1953). Proc. Amer. Soc. Host. Sci. 62, xxii.Google Scholar
Culot, J. P., van Wambeke, A. & Croegaert, J. (1958). Bull. I.N.E.A.C. Ser. Sci. No. 73, 1–105.Google Scholar
Jones, P. A., Robinson, J. B. D. & Wallis, J. A. N. (1960). Emp. J. Expl Agric. 28, 335.Google Scholar
Lott, W. L., Nery, J. P., Gallo, J. R. & Medcalf, J. C. (1956). I.B.E.C. Res. Inst. Bull. No. 9.Google Scholar
Lott, W. L., McClung, A. C., Rene, de Vita & Gallo, J. R. (1961). I.B.E.C. Res. Inst. Bull No. 26.Google Scholar
Machada, S. A. (1956). Bol. inf. Cofé, Chinchina, Caldas, 7, 123.Google Scholar
Mehlich, A. (1966a). A. Rep. Coff. Res. Foundation, Kenya, 1964/1965, 53.Google Scholar
Mehlich, A. (1966b). A. Rep. Coff. Res. Foundation, Kenya, 1965/66, 36.Google Scholar
Mehlich, A. (1966c). A. Rep. Coff. Res. Foundation, Kenya, 1964/65, 50.Google Scholar
Mehlich, A. (1966d). A. Rep. Coff. Res. Foundation, Kenya, 1964/65, 52.Google Scholar
Mehlich, A. (1966e). A. Rep. Coff. Res. Foundation, Kenya, 1964/65, 54.Google Scholar
Mitchell, H. W. (1968a). A. Rep. Coff. Res. Foundation, Kenya, 1967/68, 39.Google Scholar
Mitchell, H. W. (1968b). A. Rep. leaf. Res. Foundation, Kenya, 1966/67, 36.Google Scholar
Muller, L. E. (1966). Coffee Nutrition, in Temperate to Tropical Fruit Nutrition. (Ed. Childers, N. F.) Rutgers: The State University.Google Scholar
Pereira, H. C. & Jones, P. A. (1934). Emp. J. Expl Agric. 22, 23.Google Scholar
Robinson, J. B. D. (1961a). E. Afr. agric. for. J. 27, 1.CrossRefGoogle Scholar
Robinson, J. B. D. (1961b). Senior Chemists Conf. EAAFRO, May, 1961, Appendix 1.Google Scholar
Robinson, J. B. D. & Chenery, E. M. (1958). Emp. J. Expl Agric. 26, 259.Google Scholar
Robinson, J. B. D. & Jones, P. A. (1964). Unpublished data.Google Scholar
Robinson, J. B. D. & Hosegood, P. H. (1965). Expl Agric. 1, 67.CrossRefGoogle Scholar
Robinson, J. B. D. & Freeman, G. H. (1967). E. Afr. agric. for. J., 33, 8.CrossRefGoogle Scholar
Wallis, J. A. N. (1958). A. Rep. Coff. Res. Foundation, Kenya, 1956/57, 24.Google Scholar
Wallis, J. A. N. (1960). A. Rep. Coff. Res. Foundation, Kenya, 1959/60, 19.Google Scholar