Study on Agricultural Machinery's Contribution Ration to the Agricultural Output Growth in Zhejiang Province

Agriculture production function was presented in Zhejiang province by Cobb-Douglas production function and linear regression optimization and statistic data from 1991 to 2004,agricultural machinery's contribution ration to the agricultural output growth in area mentioned was estimated by means of production function above.Calculating results showed that agricultural machinery's contribution ration to the agricultural output growth was 12.43% in Zhejiang province,then increasing of investment in agricultural machinery and raise of agricultural mechanization development level will further enhance agricultural machinery's contribution to agricultural output growth.