Measurement and Calculation on the Contribution Rate of the Technological Advance of the Primary Industry in Henan Province
河南省第一产业技术进步贡献率测算

Model G\|C\|D,a new model of measurement and calculation of the technological advance, was established by adopting the gray system theory. The model G\|C\|D, of seventeen prefectures and cities in Henan province was established, and the contribution rates of the technological advance and funds and labour force to output of seventeen prefectures and cities in Henan were measured and calculated by using this model.