Makarova T. Agromeliorative effectiveness of phosphogypsum use on irrigated lands of the Northern Steppe of Ukraine

The object of research is the change of physical and chemical properties of irrigated saline soils and the influence of different norms and terms of application of phosphogypsum as a chemical ameliorant on soil. The purpose of the research is to determine the agro-ameliorative efficiency of chemical reclamation by phosphogypsum saline chernozem ordinary for reproduction of their fertility. Research methods - theoretical methods; experimental studies; field; laboratory; statistical; estimated comparative. RESULTS OF RESEARCH - For Theory: The introduction of phosphogypsum by calculation norms for irrigated saline chernozem ordinary under irrigation conditions in spring is first substantiated. The signs of irrigation salinity of soils that have been irrigated with mineralized water from the Samara River have been established for a long time; the optimal method of determining the rate of introduction of phosphogypsum on black earth ordinary low humus; environmental safety of using phosphogypsum as a chemical ameliorant. For Practice: The results of scientific research were implemented at the State Enterprise "Research Economy of Dnipropetrovsk Research Station of the Institute of Vegetables and Melon of NAAS of Ukraine" in the village. Oleksandrivka of Dniprovskyi district of Dnipropetrovsk region. Scope - agricultural enterprises of southern Ukraine.