SOURCES OF MINERAL ELEMENTS IN SOIL, SOIL SOLUTION COMPOSITION AND MECHANISM OF MINERAL NUTRITION OF PLANTS

Abstract

In this work, the sources of formation of mineral elements in the soil and the mechanisms of their transition to a state available to plants were analyzed on a scientific basis. The decomposition of primary (silicates, carbonates, sulfides) and secondary minerals of the soil, the mineralization of organic residues, and trace elements in dust and precipitation from the atmosphere were shown as the main sources of nutrients for the soil solution. The relationship between the ratio of cations (K⁺, Ca²⁺, Mg²⁺, NH₄⁺) and anions (NO₃⁻, H₂PO₄⁻, SO₄²⁻) in the soil solution with pH, ​​buffering capacity, and the degree of saturation of the adsorption complex was clarified from a scientific point of view.