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APPLICATION AND A PRELIMINARY APPROACH OF CLUSTER ANALYSIS AND PRINCIPAL COMPONENTS ANALYSIS IN MAJOR GLYCYRRHIZA URALENSIS DISTRIBUTED DISTRIGTS OF NINGXIA

Xu Wanren  
In this paper the major G. uralensis distributed districts in Ningxia is divided into 15 types through cluster analysis and prin, cipaicomponents analysis. It shows the similarity, disimilarity as wall as different dagrees bstween two types. The ecologieal characteristics and changing regularity of the G. uralensis distribution are analysed. it has offered certain scientific reference for rationai managements, preservation, exploitation and utilization resourcfes of G. uralensis.
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