Productivity Study of Agriculture Inputs for Wheat Planting, Case study: Mehran plain

In this study agricultural inputs productivity in the wheat cultivation during the year 2015 was analyzed. The considered variables under investigation were social and economic characteristics of farmers, and also different inputs. The research methodology was based on estimation of the average and marginal productivity function of the production and also the elasticity of production. For selection of the appropriate production functions, the likelihood ratio test was used. According to the test results, the translog production function as compared with other functions was more consistent with the observations. Based on obtained results, the maximum and minimum value of the marginal productivity of inputs were for cultivation area and machinery respectively. The final productivity of the machinery in the region represent a declining order of -4.74 kg of wheat, in exchange for additional usage of an hour of the input to the current conditions. Degree of utilization of machinery as an input in areas with no economical production level (third stage) and other inputs were observed to be in the economic production stage (second stage). The simultaneous effect of both acreage and machines on production, indicates that in small and fragmented fields, the possibility of using machineries is not justified and is associated with an increase in the cost of production.