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The purpose of this study was to determine the microelements (Mn, Fe, Zn, Cu, Cr, Ni, Pb, Co, Cd) content and distribution in the aboveground and underground parts of the Rosa acicularis, grown in different ecological conditions in the Barguzinsky district (the Republic of Buryatia). Atomic absorption spectrometry was used to determine the concentration of microelements. The highest concentrations of Zn, Cu, Ni, and Co are found in the roots of R. acicularis, Mn, Cr, Pb, and Cd in the leaves, and Fe in the sepals. The rows of metal accumulation in different plant parts have a similar sequence – Fe> Mn> Zn> Cu> Cr> Pb> Ni> Co> Cd. The different intensity of elements accumulation by plants from the soil was detected. It was show Fe, Mn, Cr, Pb and Cd transfer in vegetative parts of plants without barrier, while Zn, Cu, Ni, and Co are characterized by a barrier type of accumulation. Due to the high level accumulation of Mn, Cr and Co barriers can be used as a potential source of these elements.

In Transbaikalia information about accumulation, distribution of rare earth elements (REEs) in soils, their transportation from soil to plants is very rare. The aim of this study was to assess the migration of lanthanum in a soil profile and soil-root layer microzones of maize during the vegetation period. The study is based on a field approach in non-polluted natural sites. Concentration of total content La and its mobile form (acid-soluble, exchangeable and watersoluble) in the soil and soil root layer of maize was determined using method of selective extraction Gobran and Glegg. Maximum concentration total La was founded in the upper part of the soil (0 to 15 cm depth). The content of the La mobile forms is 6.9-11.2% from the total amount. The distribution of the element mobile forms within the profile is relatively even. Results indicated that concentration La mobile forms changed in accordance with the phase of maize development. The higher concentration of mobile forms (17-120% from germination period) was founded in soil-root layer microzones in the blossom period.

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The aim of the study is a theoretical and methodological justification of the degree of influence of the basic cooperative principles in the activities of agricultural credit consumer cooperatives (SKPK) on the development of small and medium-sized enterprises in the agricultural sector in the context of the essential content and functions performed as key factors in the subject area being studied. developmental SKPK The article conducted a study in terms of the impact of the basic cooperative principles and justification of the impact of agricultural credit consumer cooperatives (SKPK) on the development of small and medium enterprises in the agricultural sector of the economy, understanding the essence and functions, and identifying key factors affecting the development of SKPK. The study is based on a systematic approach to studying the features of the development of agricultural credit consumer cooperation, using monographic, abstract-logical, statistical-economic, abstract and other research methods. Use of monographic, statistical and economic research revealed the main factors affecting the effective operation of agricultural credit consumer cooperatives. The directions of the analytical assessment were: the number of agricultural credit consumer cooperatives, the main indicators of the development of agricultural credit consumer cooperatives.