Coffee Board of Kenya Monthly Bulletins Aug/Sept 1975

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Date
1975
Authors
Browning, G.
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Individual branches on mature trees of Coffea arabica L. growing in the field at Ruiru, Kenya,which were treated weekly with saturating doses of gibberellin and beneath which the soil was irrigated weekly to keep it near to field capacity,produced leaves faster when it rained and the temperature fell rapidly during the day.Unirrigated trees behaved differently, irrespective of gibberellin treatments, failing to 'flush' on two occasions and responding more than the irrigated trees to the main rains in May. The trees appeared more sensitive to gibberellin during the hot, dry season than during the rainy season or the cool, dry season.Both irrigation and gibberellin, which failed to replace the effect of irrigation, increased internode extension proportionately more than node production.
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