STUDY OF SOIL DENSITY BY A NON-DESTRUCTIVE METHOD
Abstract
The article presents the results of theoretical and experimental determining the relationship between soil density and moisture content by the induction method. It is established that these characteristics can be described by second-order models and used to develop means for non-contact on-stream determination of soil density and structure. The determination of magnetic susceptibility is a promising method for the study of classes of substances, which allows determining the internal structure of substances and the nature of their interactions. In this case, the soil can be considered a magnetic material that interacts with a magnetic field, the characteristics of which can be determined by specific energy changes in the magnetization source. According to its chemical composition, soil can be classified as a composite material based on diamagnetic and paramagnetic. The dependence of magnetic permeability in the range of magnetic field changes of 0.85–1.85 MHz for a density of 1.0–1.4 g/cm3 and a moisture content of 0–30 % were analyzed. The research results are promising for the development of technologies and means for remote determination of soil agrophysical parameters. The research results can be adapted to the determination of agrochemical composition that may be related to the magnetochemical parameters of the soil. The purpose of the research: Modeling of the method of remote (non-contact) determination of soil agrophysical parameters by induction method, establishing the relationship of soil agrophysical parameters in a variable induction field with soil magnetic permeability and the impact on the process of determining moisture content. Research methods: Analytical studies of the principles of interaction of a magnetic field with dia- and paramagnets. Experimental studies of the interaction of soil samples with an alternating induction field. Analysis of nonlinear models of soil-magnetic field interactions. Comparison of theoretical and experimentally obtained characteristics within the ranges of soil interactions with an induction field. Results of the study. Various means and methods of on-stream determination of magnetic permeability based on the magnetization curve are systematized. Promising methods of on-stream determination of soil density based on the characteristics of magnetic susceptibility and viscosity are substantiated.
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