Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 1
Written by Lilia BOAGHE, Vladimir FILIPCIUC, Iurii ROZLOGA, Olesea COJOCARU
In condition of the Republic of Moldova activities for improvement of the automorphic chernozem solonetzs and secondary solonetzized soils by irrigation meet severe difficulties related to the lack of gypsum in the republic. In such a situation, there appeared a need to use and test new amendments obtained basing on industrial waste which contains components of calcium and acid pH. Automorphic chernozem solonetzs and complexes of soils with different degree of solonetization are spread in all soil provinces of the Republic of Moldova, but the most important areas are located in Ciuluc Hills steppe, on the periphery of Codri Plateau as well as in Southern Moldova Plain. Automorphic chernozem solonetzs subtype was formed and has evolved on deposits of salty Neogene clay which contain 1-2% of soluble salts with sodium sulfate predomination. It is important to note that parental rocks of automorphic solonetz are situated at a shallow depth of 50-100 cm. Halogenesis processes from the soil of the republic are caused not only by natural factors such as soil formation rocks with high content of soluble salt or highly mineralized groundwater. With the beginning of chernozems irrigation process, soils salinization and more frequently, secondary solonetization of zonal soils was recorded. Zonal soil alkalization is highly intensified as a result of irrigation with water from local sources such as inland rivers, ponds and reservoirs. These are characterized by high degree of mineralization, alkaline pH and unfavorable chemical composition. Sodium compounds predominate in soluble salts composition.
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