Pol'ovyj V. M., Lavruk M. M., Kulyk S. M.
Pages: 12-17.

Full article: 

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Abstract

The purpose. To determine dependences of prolonged application of fertilizer systems and chalking by various dozes of CaCO3 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 sod-podzolic 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 CaCO3 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.

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Key words: soil, chalking, fertilizer system, acidity, base exchange capacity, humus, grain units.

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