现代地理学的目的在研究各地地理景观的区域差异(Areal differentiation)。决定各地区域差异(或地理个性)的因素,以农业最为重要。

In the last decade, growing attention has been paid to the study of crop productivity which has an important bearing on the areal differentiation of agricultural landscape稦our kinds of coefficients have been devised to measure the productivity, i.e. the productivity coefficient, the ranking coefficient, the money value coefficient and the energy cofficient. It has been shown else-where that the money value coefficient is a more useful and more direct indi-cator of crop productivity, and economic units correspond rather closely with nutritive units. In the present study, both money value coefficient and energy coefficient have been calculated so that the results may be compared.