Rainfall and Rainfall Variability
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Thornton PK. 2014. Rainfall and Rainfall Variability. In: Sebastian K, Ed. Atlas of African agriculture research and development: Revealing agriculture's place in Africa. Washington, D.C.: International Food Policy Research Institute (IFPRI). p 38-39.
In Africa, where most agriculture is rainfed, crop growth is limited by water availability. Rainfall variability during a growing season generally translates into variability in crop production. While the seasonality of rainfall in the drier rangelands can play a significant role in productivity, rain-use efficiency (RUE)—the amount of biomass produced (in kilograms of dry matter per hectare) per millimeter of rainfall—also drives production.