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Within the study of the River Jadar management, the biological and hydro-engineering characteristics of the watercourse and the riparian land were comparatively researched. The floristic diversity of the Jadar riparian area was studied and the existing plant species and communities, life forms and floral elements were identified. On the other hand, the study of the morphological and hydraulic characteristics of the water course included the basic factors of river channel and banks regulation - the variation of morphometric parameters, hydraulic resistance and the stability of the river banks. Based on the study results, the guidelines of river management were defined from the aspect of biodiversity conservation and ecosystem enhancement of the Jadar valley. .

One of the essential analyses which is performed during the floristic study of a region is the analysis of the biological spectrum. The analysis of the biological spectrum of the flora includes the determination of the type of life form for each taxon described in the flora of the study region. If it is considered that life form is a specific structural-functional response to the environmental effects and the result of the adaptation during the species evolution, it is clear that the basic characteristics of the site are more or less reflected in any life form. This fact is confirmed by the analysis of the biological spectrum of Divčibare flora. The study results are in correlation with the results of the analysis of the biological spectrum of the flora of Serbia and the Balkan Peninsula.

The high floristic diversity of Stara Planina was the starting base for the research of medicinal and aromatic plants (MAPs) in individual forest and meadow communities. The sites Javor and Prelesje, forest community Fagetum moesiacae montanum B. Jov. 1953, pioneer community of birch Betuletum verrucosae s.l. and meadow community Agrostietum vulgaris (capillaris) Pavlović, Z. 1955, were researched as follows: soil types, floristic composition and structure of the community, percentage of MAPs, as well as the selection of species which, according to the predetermined criteria can be recommended for further exploitation. The study shows that the soil of the forest communities is eutric brown, and meadow soils are dystric and eutric humus-siliceous. The percentage of MAPs in the floristic structure of the study sites in forest and meadow communities is 32.35%. The following species can be recommended for the collection and utilisation: Hypericum perforatum L., Asperula odorata L., Dryopteris filix-mas (L) Schott. Urtica dioica L., Euphorbia amygdaloides L., Prunella grandiflora L. Tanacetum vulgare L., Achillea millefolium L., Rumex acetosa L., Campanula glomerata L., Stachys officinalis (L) Trevis., Plantago lanceolata W. et K., Potentilla erecta (L) Rauchel, Chamaespartium sagittale (L) P. Gibbs. Cynanchum vincetoxicum (L) Pers., Euphrasia stricta Host., Fagus moesiaca (Matt) Liebl. and Fragaria vesca L.

The aim of phytogeographical analysis is to determine the plant species origin, genesis and migrations. The study results contribute to the knowledge of phytogeographical classification of the particular regions. Different chorions, by their effects, determine the flora structure and composition. The aim of the floristic research of Divčibare was to identify the diversity of flora in this region, i.e., in a wider sense, the diversity of flora in Serbia. Phytogeographical analysis was based on floristic research. The identified plant species were classified into the corresponding floral elements, area groups and area types. The data on diversity and the degree of representation in the flora of Divčibare were obtained based on the percentage of each area type. It was concluded that the flora of Divčibare has a transitional, Central European-Mediterranean-Pontic character.

A very important parameter for the utilization of medicinal plants is the quality of active substances. The quality of the plant active substances does not depend only on its physiological potential and condition, but also on the environmental factors. The status of microelements in the soil and the basic ecological indices of plants, as the site indicators, at two localities on Mt. Kosmaj are presented. It was concluded that these relationships are very complex, in most cases identical and in direct correlation with the representation of individual plant species. Medicinal plants were analyzed in the first place because of their potential exploitation.

In the paper the results of study of soil ecological quality in the area of Kosmaj, from the aspect of chemical degradation process, are presented. The aim of this investigation is to define the possible, limiting and endangered factors for development of medicinal and aromatical plants. The estimate of soil quality was done on the bases of calculation of indicator values of availability of nitrogen (N), phosphorous (P), base cations and heavy metals and sensitivity to acidification.