Agro-Climatic Potential of Northern Uganda for Extensive Cultivation of Oilseed Crops

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Date
1986
Authors
Jaiswal, S.P.
Rajput, G.S.
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Abstract
Suitability of a crop or crop cultivator to any region is in a large measure controlled by Climate inter-acting with soil. Hargreaves (1975) carried out extensive rainfall analyses for defining 'the agricultural potentiality of semi-arid tropical North-eastern Brazil for rain fed agriculture. He found that if the amount of the rainfall(R) was sufficient: to meet one-third of Potential evapo-transpiration (ETp), it was sufficient to meet water requirement of dry land Crops in soils with a fair amount of water holding capacity. FA0 (1978) defined crop growing period 'as the period during a year when R/ETp>0.5. Plus a period required to evapo-transpire an assumed 100 mm of water from excess precipitation (or less if not available) Stored in the soil profile. These approaches however, give only a qualitative assessment of the crop growing period. Hence, for a more realistic estimate of a crop growing period It is desirable to match the simulated water temporal requirement with available natural resources of dependable rainfall 'and soil moisture reservoir for varying crop durations.
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East African Agricultural And Forestry Journal, 51 (No 3), p. 174-186