Global climate changes (CC) evidently have an impact on the weather patterns caused by a marked increase in atmospheric temperatures. Subsequently, erratic weather patterns making weather prediction a problem. This in turn has impacted negatively on rain fed agriculture. Of all the climatic factors, the daily and inter-annual variation in precipitation is most crucial for rain fed agriculture and the runoff for irrigated production. The day-to-day variability of rainfall associated with weather is the major risk factor for most forms of agriculture. Soil moisture deficits, crop damage and crop diseases are all driven by rainfall and associated humidity. Variability in rainfall intensity and duration makes the performance of agricultural systems in relation to long-term climate trends very difficult to anticipate.
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