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The effect of different doses and time of boron fertilization on growth and development of grape plants were studied on the soils of Terek-Kumskiy sands of Chechen Republic, Russian Federation. The aim of research is to study the content of boron in the soil and to identify the physiological response of the vine plants on boron fertilizer. The obtained data of the boron total content in the studied sandy soil showed that in 0-60 cm layer of the soil the boron total content ranges from 0.4 to 0.5 mg/kg, in 60-150 c...

This paper presents a new approach to the evaluation of dynamic soil strength based on the hypothesis of discreteness of the deformation process - a method of self-excited vibration. This method was first discovered at the sandy soil shear test. The destruction of the soil is viewed as cyclical and consists of two phases: the static and dynamic. On static stage deformation is slow, with energy accumulation. In the dynamic there is a rapid discharge, accompanied by a sharp increase in strain. Self-excited vibration...