Study on Agricultural Machinery’s Contribution Ration to the Agricultural Output Growth in Jinhua City

In order to analyzing agricultural machinery’s contribution to agricultural output growth , agriculture production function was presented in Jinhua city by Cobb-Douglas model and linear regression optimization and statistic data from 1989 to 2005, 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 15.33% in Jinhua city, then increasing of investment in agricultural machinery and raise of mechanization level of farm work will further enhance agricultural machinery's contribution to agricultural output growth.