The purpose of research is accumulating scientific data on the physical, chemical and microbiological soil characteristics, needed to develop a methodology for assessing the soil quality through a comprehensive approach of physical, geographical, climatical conditions from Aranca Plain. Between soil characteristics and the main cultivated or wild species can establish a diverse and complex relations of reciprocity. Thus soil characteristics can exert an influence on the development of root systems, mineral nutrition, insurance of water and temperature regime for the main physiological processes necessary to carry the plants, in turn acts both directly and indirectly on the state of soil fertility. Research on the main physical and chemical properties of soil were taken by many scientists in this country and abroad since the beginning of last century and the German classification system was designed mainly based on soil texture in phase of its evolution . As part of the soil, clay plays a role in the relations established between certain physical and chemical soil properties and between them and the activities of organisms that inhabit it. The research undertaken in recent years, by this group in collaboration with specialists from the Department of Microbiology, Faculty of Sciences and Informatics, University of Szeged, Hungary, is a test of some aspects of establishing the link between physical-chemical components and microbiological activity for development of methodologies for analyzing soil microbial diversity in relation to its functions and quality or soil health. Physico-chemical properties of soil samples (texture, pH, humus and N,P,K content) and biochemical and microbial diversity of the samples were analyzed in the OSPA-USAMVB Timisoara Research Laboratory according with national norms and standards and in the laboratories of the Department of Microbiology, Faculty of Sciences and Informatics, University of Szeged (the microbial activities diversity was evaluated by PCR-based of analysis of rRNA spacer intergenic-RISA). Knowledge of these special features of the soil presents a theoretical and practical importance. Theoretical, because it provides to expert the posibility to  interpret the phenomena that occur in soil and to predict soil evolution in particular and environment in terms of present and future health and practicaly because warns as what action should be taken to bring optimum soil conditions for growth and development of plants. The importance, originality and timeliness of the paper is the necessity for protection of soil and environment and objectives of the project CBC HURO Development and evaluation through a comprehensive approach to the chemical - physical - microbiological of soil quality are: the accumulation of scientific data necessary to support the consevative technology of soils and sustainable management of soil and water resources and implementation of the conservative tillages and sustainable management of physical and geographical conditions of the Aranca Plain.

biodiversity, cooperation;cohesion; durability; monitoring;

Presentation: oral