Coffee Board of Kenya Monthly Bulletins February 1971

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Date
1971
Authors
Aduayi, E. A.
Bould, C.
Kimeu, B. S.
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Abstract
Fertilizer programmes for Coffee (at present) are based largely on past experience, or on field manurial trials, or on soil analysis data,or on a combination of all three.In general,crop yield responses are obtained from nitrogenous fertilizers only,although there are indications that in certain areas yields have been improved by phosphatic fertilizers (Mehlich,1968).There appears to be little critical data on yield responses to other major nutrients, or to trace elements,although magnesium and iron appear to be associated with bean quality.It should be emphasized,however,that little information is available from critical experiments in which the nutrients under test were known to be the only limiting factors,or in which the applied nutrients were shown to be taken up by the trees (as reflected in a changed nutrient status).
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Monthly Bulletin
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