Coffee Board of Kenya Monthly Bulletins September 1989

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1989
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Abstract
Work was started in 1981 to establish the yield potential and nitrogen fertilizer requirements for Robusta coffee (Coffea canephora) under Leucena leucocephala shade in Western and Coast regions of Kenya. There was very poor establishment at the C(last region, but in Western Kenya an average yield of 3 tons ha- 1 dry mbuni was realised. There was no significant yield response to nitrogen fertilizer. The highest nitrogen rate of 320 kg N ha- 1 had a retarding effect on coffee growth. Mbuni was noted to be about 55% of cherry while clean coffee was approximately 42% of the mbuni. The clean coffee works out therefore, to be 23% of cherry. The trees under a lighter shade of Leucena leucocephala increased cherry yields by a magnitude of 90%. Further nutritional studies mainly as on-farm experimentation is suggested.
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Bulletin, 54 (635), pp. 665-684
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