The extent of integrated mechanization at Huanghai State Farm in Jiangsu province of China was systematically studied with multidimensional grey assessment theory and grey modelling theory. Of the 22 factors influencing the extent of integrated mechanization six most important ones are: intact rate, newness coefficient, total power, total plantation area, matching ratio, and population of tractors. They are utilized to establish three sub-models which can affect the rules of integrated mechanization from various points of view. As these models are of high precision, all of them can be used to forecast and control the degree or extent of agricultural mechanization degree.
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