MOA-NAL- Fertilizer Use Recommendation Final Report Volume 20 Kiambu District 1987

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Date
1987
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Ministry of Agriculture
Abstract
The Agro-Ecological Zones of Kiambu District extend in a typical pattern along the eastern slopes of the Nyandarua (Aberdare) Range parallel to the isohypses, as shown on Map 20.0.3. Average annual rainfall in the District is variable, ranging from <600 mm in the south-east (Zone UM 5-6) to >2000 mm in the north-west (Zone UH 0) of the District. Rainfall steadily increases from east to west, almost in line with the increasing altitude, decreasing rapidly, however, in the rain-shadow of the Nyandarua Range. The rainfall pattern is bimodal and rainy seasons are clearly separated: first rains start mid to end of March, with their peaks in April/May. Second rains start mid to end of October with their peak in November.
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