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

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Jaiswal, S.P.
Rajput, G.S.
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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.
East African Agricultural And Forestry Journal, 51 (No 3), p. 174-186