In an environment of fluctuating yields due to weather uncertainties and varying market responses of farmers as a whole the importance of having correct estimates of production is of utmost importance from a public policy point of view. For making right decisions about the most sensitive area of food security and for long term planning it is desirable to estimate the key variables in advance for a reasonable planning horizon. Also the study of supply response at disaggregated level is imperative as responses may be different for different zones. Therefore, the concern of this thesis is to examine the impact different factors on the supply of agricultural commodities in different agro-ecological zones in Punjab in order to make necessary adjustments in the policy reforms. The knowledge of supply greatly helps in farm decisions in allocation of resources in right direction. It can help planners and policy makers to allocate and achieve production targets and in long term planning. It thus provides a framework for adjusting production to the optimum resource employment to promote economic development.