Using the two-dimensional order clustering algorithm which had been revised by the author

and combining principal components analysis and resources indices analysis of agriculture in different counties and cities

Yanan prefecture is divided into four agricultural regions. The situation in northeastern region is the worst

and its developing strategies are to control soil erosion and to create satisfactory cycles for ecological system. The situation in northwestern region is also worse

and the developing strategies are to control soil erosion，to exploit underground water and to use the cultivars of crop and grass that perform well in cold climates. The situation in southwestern region is moderate

the potential for developing the southeastern region is the largest

its developing strategies are to increase stock raising

to exploit natural resources on the mountains

to enlarge the scale of crop production and to construct the base for agriculture

forestry and stock raising. These results provide a scientific basis for the developing planning of agriculture in this area. At the same time

the computer software of two-dimensional order clustering algorithm was given in order to provide a effect tool for the application and studies.