Arguments are presented for changing the approach to soil studies in order to consider the behavior of soils in terms of a colloid-chemical model rather than in terms of a physical model, Experimental studies of changes in the stickiness of an air-drychernozem depending on the time elapsed since adding water, of the catalase activity of soils depending on the time elapsed since adding water and salt solutions, of the thermal diffusivity of soils depending on the time elapsed since adding water, andof the soil temperature showed that the soil solution is a structured colloidal system. Electron microscopic studies of soil solutions confirmed that colloidal particles of soil solutions interact with one another due to long-range aggregation to form periodic colloidal structures enclosing soil moisture. It was concluded that the colloidal structuring of the soil solution makes it similar to physiological fluids and makes the soils similar to biological systems; therefore, the consideration of soils in terms of a colloid-chemical model expands our knowledge of these systems and can be useful for soil scientists.
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