ПОРІВНЯЛЬНА ХАРАКТЕРИСТИКА ВМІСТУ КАЛЬЦІЮ ТА СТУПЕНЯ КИСЛОТНОСТІ У ҐРУНТАХ ТЕРНОПІЛЬСЬКОЇ ОБЛАСТІ

The soils of Ukraine have been well studied, however this did not prevent them from the intensive degradation processes. About a third of the arable land is eroded, about 20% of organic matter is lost, almost all the arable land in the subsoil is compacted, the nutrient forms of mobile phosphorus and especially calcium are significantly reduced, calcium, occupying the bulk of the cation exchange capacity of the soil, serves as a regulator. Calcium is a coagulator of soil colloids, protects them from destruction and removal to the lower horizons of the profile; promotes the formation and preservation of humus and its stable compounds; creates proper physical conditions, plays a crucial role in structure formation; binds moving forms of compounds of aluminum, iron, manganese, which adversely affect the cultural vegetation. Calcium is also a direct nutrient of plants and soil microorganisms and plays an exclusive mobilizing role in soil, increasing the content of basic nutrients available to plants, primarily phosphorus. In the work we carried out chemical assessment of soils of Kozova, Zboriv Shumsk, Pidhaytsi and Berezhany districts of Ternopil region. We also studied the acidity, content of exchangeable calcium and natural factors that determine the peculiarities of agricultural natural resource use and influence. Correlation relationships between the studied values are established.