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Abstract

The results of the three years' researches conducted on dark-chestnut carbonate easily clay soils of JSC AF “Aktyk” of Tselinograd region of Akmolinsk area on studying of reaction of soy to conditions of nitric food and nitric fertilizers are presented in work.
In work the major factors defining efficiency of nitric fertilizers are shown, the method of determination of deficiency of nitrogen in the soil an optimum level of its contents at which soy forms the greatest possible crop in the developing moistening conditions is stated. The method allows calculate a necessary dose of nitric fertilizers for achievement of an optimum level, at a guarantee of economic efficiency and ecological safety of the use of fertilizers, thereby allows purposefully operate the nitric mode of soils taking into account requirements of soy to the conditions of nitric food. Influence of a climatic factor on nitrogen fixing  ability of soy is revealed.