Discussion on the Ecological Principles of Stereoscopic Agricultural Construction and Stereoscopic Constructure Design

Stereoscopic agriculture (SA) is an important way of solving the problems of big population and Small land in our country,which has wide developing prospect.In order to make SA develop scientificly,this paper has discussed the character of SA structure and the ecological principles of its construction, and illustrated the design of SA structure by taking the rainfed agriculture in the loess hilly and gnlly region of northwestern area as an example.