Soil salinity is the salt content in soil; the process of increasing the salt content is known as salinization. Salts occur naturally within soils and water. Salination can be caused by natural processes such as mineral weathering or by the gradual withdrawal of an ocean. It can also come about through artificial processes.Salinity problems occur when soluble salts, from irrigation in productive soils, are concentrated, which is called secondary salinization. This phenomenon affects humanity since the beginning of agriculture, and there are historical records of migrations caused by salinization of arable land. Salinity affects growth and crops production by reducing the water potential of the soil solution, thereby decreasing water availability, and creating a nutritional imbalance due to the high concentration of elements (Na+, Cl–) that can interfere with mineral nutrition and cell metabolism.
Calcium has a moderating effect on salinity effects and especially on the sodium in the soil and in the plant. Calcium, being a bivalent cation with a lower hydration layer, moves sodium out of exchange complex and improves the aggregation of saline soils. A most important activity of calcium and other cations in soils with sodium reduces the toxic effects of this element in plants. Also calcium promotes the exchange in the clay-humus complex of the soil and the displacement of its sodium ions which are leached and separated from the exchange complex, reducing the percentage of interchangeable sodium. Saline corrector can be made easily by using regular raw chemicals, so all formulas for saline corrector are available on www.buyformulas.com.
