Soil solution

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The soil solution comprises the liquid phase of the soil and consists of the soil water with the components that are soluble in it.

The soil solution is fed by the precipitation with its atmospheric gases, aerosols and fungal spores absorbed from the air . When it penetrates the soil, this supply becomes seepage water , which enters into an intensive exchange with the soil air , which is rich in carbon dioxide . The soil solution, which is now enriched with carbon dioxide, exchanges soil particles such as clay minerals , humus particles and sesquioxides , with which a dynamic equilibrium is formed, which manifests itself in the form of cation exchange or anion exchange .

As a carrier of the plant-available nutrients in the soil, the soil solution provides the nutritional basis of the vegetation and thus of earthly life. Since the constituents of the soil solution would gradually be depleted if the soil solution were continually withdrawn by harvested crops ( soil depletion ), the nutrient deficit in the form of the removed biomass must be regularly compensated in the form of fertilization .

See also