| 1 | Through investigating the development status of walnut industry in Danfeng County, the feasible development direction was put forward based on problems existing in walnut industry. | |
| 2 | And in this conclusion on the basis of a preliminary Danfeng County UGB exploration, and reached the "rigid" UGB and "flexibility" UGB. | |
| 3 | This paper applies the principles of landscape ecology of scope of the study in Center City, landscape-scale, landscape elements and some issues. |