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The paper discusses the effect of pre-sowing treatment of buckwheat with organic fertilizers on its structural indicators, yield and susceptibility to root rot. It was found that fertilizing has a positive effect on growth, development and yield of buckwheat in comparison with the control. Potassium humate was revealed to be particularly effective and showed the yield range from 3.2 t/ha in Chishminskaya and Barynya varieties and to 4.0 t/ha in Devyatka variety.

The results of economic efficiency of mineral fertilizers application in grain and steam crop rotation in the conditions of Zauralie are presented. Agronomic efficiency has been determined, in which the payback of 1 kg of active substance (e.g.) of fertilizers applied to the variant with the use of three batteries averaged 1.7-1.9 kg for 3 years, the maximum payback was observed in the variant with a minimum dose of P40 - 2.6 kg/kg. Calculation of economic efficiency has shown that at increase in a dose of mineral fertilizers and industrial expenses there is a decrease in a recoupment on 0.16-0.30 rbl.

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