Suburban agriculture in Setif (Algeria): which future in face of urban growth? The suburban agriculture in Setif which is mainly based on the specialized agricultural activities (cereals, animal production) has an important role.

Land as a production factor occupies a special position in the economic activities of the urban population. Land resources in big cities are not only territorial basis for placing industrial and production structures, but also a space for urban life in general.

North China is the most important food basket of China, where the majority of wheat and corn are produced. Most crops grown in North China are irrigated, thus water security is food security.

Other papers concerning agricultural economics frequently emphasise a problem of low resource productivity.

In order to objectively and reasonably evaluate the actual and potential value of cultivated land, both social and ecological values are introduced into the classification and grading index system of cultivated land based on the viewpoint of sustainable development, after considering the natural