Year-to-Year Variation in Yield: The Effect of Rainfall and Its Distribution
Because yields vary so much from year to year due to vagaries of the rainfall, it is difficult to identify the underlying yield trend. To overcome this problem to some extent, both yields and rainfall data are presented throughout as moving averages over 3 or 5 years, the assumption being that there will be a close connection between crop yield and rainfall pattern. This is very likely and work over recent years confirms that it is so. Water supply to the crop is of prime importance in determining yield for crops like maize, sorghum, upland rice, sugar cane, groundnut and, to some degree, cotton.
KeywordsSugar Cane Water Balance Water Requirement Ivory Coast Upland Rice
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