An alternative index to ESP to explain dispersion occurring in Australian soils when Na content is low

Re-use of industrial and agricultural wastewater for irrigation can increase the concentration of potassium in soil and affect soil structure. However, investigations of clay dispersion have traditionally focused on soils with high exchangeable sodium, therefore exchangeable sodium percentage (ESP) has been used to assess soil structural stability. Currently, Australian soils have been considered non-sodic or non-dispersive when the soil ESP <6. However, a few studies have demonstrated that potassium (K) ions in the exchange complex of soil can also assist clay dispersion even when the exchangeable sodium (Na) levels are minimal. The dispersion (as turbidity) and ESP were measured on 74 Australian soils. 17 of those soils showed a considerable level of dispersion, despite ESP <4.5. In all of these soils the Na to K ratio was <1. The relationships between ESP and turbidity were poor (R2= 0.23) indicating limitations of using the ESP for identifying potentially dispersive soils when K is present on the soil exchange sites. Therefore, we used exchangeable cation ratio (ECR), as an index alternative to ESP, but which takes into account effects of exchangeable K on clay dispersion. The good correlation obtained between ECR and the parameters like turbidity and zeta potential support its use in assessing soil structural stability when the appreciable amount of K present on exchange sites

ANALYSIS OF THE CHEMICAL COMPOSITION OF CHAROITE ROCKS

The unique charoite mineralization, established on the Murun alkaline massif in the northwestern part of the Aldan shield on the border of the Irkutsk region and Yakutia, is still of great interest to some of researchers (geologists, crystallographers, geochemists, etc.). The outcrops of charoite-bearing rocks at the “Sirenevyi Kamen” deposit are noted both in the indigenous outcrops and in eluvial clatters [Bondarenko, 2009].The unique charoite mineralization, established on the Murun alkaline massif in the northwestern part of the Aldan shield on the border of the Irkutsk region and Yakutia, is still of great interest to some of researchers (geologists, crystallographers, geochemists, etc.). The outcrops of charoite-bearing rocks at the “Sirenevyi Kamen” deposit are noted both in the indigenous outcrops and in eluvial clatters [Bondarenko, 2009]

Development of the method of quaternion typification of Clifford algebra elements

In this paper we further develop the method of quaternion typification of Clifford algebra elements suggested by the author in the previous paper. On the basis of new classification of Clifford algebra elements it is possible to reveal and prove a number of new properties of Clifford algebra. We use k-fold commutators and anticommutators. In this paper we consider Clifford and exterior degrees and elementary functions of Clifford algebra elements.Comment: 15 page

Methods for prevention of functional disorders of the kidneys in students

In recent years there has been growth in the number of students who have kidney and urogenital system, in connection with which they are forced to engage in physical culture in special medical group or be exempt from the practical exercises. Proper application of gymnastic exercises in combination with a healthy lifestyle prevents progression of the diseaseВ последние годы наблюдается рост количества студентов, имеющих заболевания почек и мочеполовой системы, в связи, с чем они вынуждены заниматься физической культурой в специальной медицинской группе или быть освобожденными от практических занятий. Правильное применение гимнастических упражнений в сочетании со здоровым образом жизни предупреждает прогрессирование заболевани

Method of Determination of Natural Frequencies and Forms of Nonlinear Vibrations for Layered Cylindrical Panels

The technique of finding a finite number of first natural frequencies for geometrically nonlinear vibrations of layered elongated cylindrical panels at discrete consideration of components is proposed and verified. The influence of the radius of curvature on the natural frequencies of three- and five-layered panels is investigated. The dependence between the volume of filler three-layer panels and the lowest natural frequency has been established

Modern information technologies in formation of physical education of the students

The use of information technologies in the study of discipline "Physical culture" will allow to raise interest of students to acquire knowledge and to activate cognitive activity, will contribute to the formation of physical education and cultural competencesИспользование информационных технологий при изучении дисциплины «Физическая культура» позволит повысить интерес у студентов к получению знаний, активизировать познавательную деятельность, будет способствовать формированию физкультурной образованности и общекультурных компетенци

Model of monitoring of physical preparedness of students

Monitoring can be as an information tool of educational process on physical culture and a means of process control applied physical training of students at the universityМониторинг может являться как информационным средством учебного процесса по физической культуре, так и средством управления процессом прикладной физической подготовки студентов в вуз