Differentiationof physicochemical parameters and productivity of sod-podzolic soil owing to long application of different fertilizer systems and doze of lime Poliovyi V., Lavruk M., Kulyk S. Institute of agriculture of Western Polissia of NAAS, Rivenska Str.,5, village Shubkov, Rivne region, Rivne oblast, 35325, Ukraine; The purpose. To determine dependences of prolonged application of fertilizer systems and chalking by various dozes of СаСО3 on the content of humus and physical and chemical properties of sod-podzolic cohesive sand soil and its productivity. Methods. Field experiment, laboratory researches, systems analysis, estimation-comparative. Results. Data are given of long researches (1980 -2015) in studying influence of organic and organic-and-mineral fertilizer systems in crop rotation and of various dozes of lime on the total yield of grain units, content of humus, potential and hydrolytic acidity, base exchange capacity, sum of the absorbed bases and saturation capacity by them of sod-podzolic cohesive sand soil. Conclusions. Application during 35 years on sour sodpodzolic soil of organic and organic-and-mineral fertilizer systems without chalking has not provided growth of content of humus. Combination of organo-mineral fertilizer and chalking with simultaneous increase of dozes of СаСО3 led to increased content of humus and improvement of physical and chemical characteristics of soil. The greatest total yield of grain units was gained at entering 1,5 dozes of lime on the background of organic-and-mineral fertilizer system.Key words: soil, chalking, fertilizer system, acidity, base exchange capacity, humus, grain units.https://doi.org/10.31073/agrovisnyk201805-02 The soil cover of the Polissia of Ukraine is represented mainly by light in granulometric texture sod-podzol soils with a low content of humus and nutrients and unsatisfactory physical and chemical indicators, which significantly limits the possibility of maintaining cost-effective plant cultivation on them. The top-priority measure in radically improving of acidic soils is liming.The economic efficiency of the chemical melioration of acidic soils is largely determined by the doses of lime, the continuance of their effect, and the relationship between the costs of liming and the secondary value of crop yields during the period of its stable effect.However, works that cover experimental data on the effects of various doses of lime, taking into account their continuous aftereffects on humus content and physicochemical properties and soil productivity in Ukraine, are published extremely rarely due to the very limited number of stationary experiments in which these issues can be studied.Analysis of recent research and publications. The increase in productivity of acidic soils after their liming is due primarily to the improvement of physical and chemical properties, which is a prerequisite for increasing the content of humus, nutrients and activation of microbiological activity [1,2,3,4,5].In the question of liming, the study of influence of d...