Study on agricultural production efficiency of prefecture-level cities in Henan province by DEA method.

On the basis of the non-parametric DEA method,the agricultural production input and output indexes from 2008 to 2010 were selected to analyze the changes in the agricultural production efficiency of 18 prefecture-level cities in Henan province.The results showed that: in the study period,the agricultural production synthetic efficiency,pure technical efficiency and scale efficiency of each prefecture-level city in Henan province were increasing,but some prefecture-level cities fell short of efficiency,because of the redundancy in the inputs of agricultural labor,sowing area of crops,total power of agricultural machine,and agricultural chemical fertilizer quantity.It is necessary for the areas with relatively low agricultural production efficiency to find out the influential factors and specifically improve agricultural production efficiency.