On the Dynamic Change of the Farmland in Mianyang and Its Impact on Agricultural Output

By use of the data for the farmland of Mianyang in recent ten years, an overall description was given on the dynamic changes in the area of arable land and the area per capita. The gradient of the farmland in the years between 1960 and 2010 was calculated and by the use of SPSS a driving factor analysis was done and it was found that: there exists a negative correlation in between the economic development, the growth of the total population and the decrease in arable land. A regressive analysis of the influencing factors of agricultural output finds that the economic development of a city exerts greater impact on the agricultural output than the fluctuation in the area of the arable land and some counter measures were suggested as well