Evaluation of effect of technology and weather fluctuations on rice yields in Punjab
Reliable crop weather technology models are needed for yield prediction and for the determination of climatic risk component in crop production. In the present study such an attempt has been made for forecasting kharif rice yield in Punjab. Critical examination of several multiple regressions showed that the yield is very sensitive to technological trend parameter and to the specified period of data utilised to develop the regression equation. In the study three technological trend parameters have been introduced. Among the weather parameters rainfall during July has been found to be a stable significant parameter independent of the period of data used.
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