Coffee Board of Kenya Monthly Bulletins December 1974

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Date
1974
Authors
Cannell, M. G. R.
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Abstract
The proportion of large, commercially valuable coffee beans (6.75 mm sieve) varies greatly within and between years in Kenya and is altered by field treatments which affect the water status, seasonal fruiting pattern and yield of the trees.Defoliation trials suggested that little of this variation could be attributed to changes in assimilate supply during fruit development,although these could explain differences in the weight of the fruit pericarps. The largest differences in bean size recorded in past field trials at Ruiru were associated with differences in rainfall,and presumably tree water status, while the fruits expanded;the ovules did not reach full size when they expanded during dry weather.
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