Analysis of the Effects of Farming Systems on the Production Factors Productivity of Potato Production; A Case Study of Kordesatan and Hamedan

In the study, the effects of farming systems surveyed on the productivity in the 2011-12. The data collected 208 Questionnaires by two stage cluster sampling in the Koredestan and Hamedan. The efficacy of farming system computed with dummy variable, and for selection the best produce function, checked by flexible and non-flexible functions. by two stage cluster sampling in the Koredestan and Hamedan. The efficacy of farming system computed with dummy variable, and for selection the best produce function, checked by flexible and non-flexible functions. Results indicate that production function Cobb - Douglas is better than the other tested functions. Also the effect of ownership farming system is positive on the production factors productivity in the case study. And the effect of other farming system is negative. So, Agriculture of Jahad Organization can encourage the farmers for bought the rent, common and joint of lands, with low interest rate loan for farmers.