本文通过对渭北旱原土地类型结构的研究,根据土地类型空间组合结构、时间演替结构以及数量质量结构的一致性,自下而上组合自然小区。揭示了各区的自然地理特征和主要存在问题,提出改造措施和合理利用方向。

The Weibei Dry Plain, Located to the north of Weihe River, is an important region for developing agriculture in. Shaanxi Province. It is rich in temperature and land resources, but rather poor in water resources, and erosion of soil is serious. Taking landform, vegetation aad soil as chief criteria, 7 firstlevel land types and 33 second-level land types are identified in the Weibei dry plain. A hierarchical scheme for land classification in the region is introduced.By the structure of land types we mean spatial arranging structure, succession structure and quantitative structure. In the Weibei Dry Plain, spati al arranging structure of land types may be divided into five groups, step-like, symmetrical ladderlike, sequential-distributed, belt-like and vertical-layer. According to structures and physical features of land types, the Weibei Dry Plain may be divided into 7 natural areas.Discussions are made on the major features of each natural area, as well as the orientation of its economic use.