Author(s): DK Swain and D Bhattacharya

Abstract: Climate plays a pivotal role in crop growing period, crop production and productivity. The change of climate with time demands adoption of new package of practices and technologies. This requires knowledge of impact of weather variables on the crop over the years. Based on this pre-requisite knowledge; the new technologies or policies could be developed and implemented. The impact of weather variables on crop yield can be assessed through the use of multiple linear regression technique. The traditional average method of weather variable over the cropping period and the weather indices have been used to study the impact. Impact of individual weather parameters has also been studied through hierarchical partitioning of total R² to component R². The study shows that in Bargarh district, relative humidity has a positive significant effect whereas minimum temperature has significant negative effect on yield of rice when traditional averaging of weather parameters and weather indices are considered.

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