Usage Positive Mathematical Programming Method in the Study ofInfluence Climate Change on Selected Products of Agricultural (Case Study: City of Gorgan)

climate change today's dilemma the crisis of tomorrow. With this approach in this study the effect of climate change on the performance and land use in selected products were studied in the city of Gorgan. For this purpose the process changes the variable time series of temperature and precipitation during the year 1390 – 1360 studied. Using the regression of average annual temperature and precipitation variables as indicators of climate change annually on performance of wheat and rice crops in crop years 1390 – 1360 studied Then, using the results of regression analysis and incorporate them in a positive mathematical programming model Scenario 1 degree increase in temperature and decrease the effect of 1 mm of precipitation on land and carrier performance agricultural products were analyzed. Regression analysis showed that the negative effects of climate change on wheat and rice have a positive impact on performance PMP model analysis showed that users in order to increase rice cultivation land Changed

Keywords:

Climate change , performance of the agricultural sector , positive mathematical programming , Gorgan , Wheat , rice , Ordinary Least Squares