Abstract
Every year the anthropogenic impact on natural resources on the territory of Kazakhstan, in particular, on the soil cover, is increasing, which leads to its degradation. Along with this, there is a decrease in the content of humus, available forms of nutrients in the soils of the republic, which leads to a sharp decrease in the productivity of crops. In this regard, there is increasing concern for maintaining a stable bioproductivity of the country's soil resources. To solve existing problems, it becomes necessary to take measures on the part of the state to reproduce soil fertility and rational use of soil resources and agricultural land. The accumulation of waste is also a global and national environmental problem. Ash and slag belong to V hazard class waste (practically safe), and they are quite applicable as fertilizers for agriculture and are of great importance for the environment, as they contribute to waste disposal. The article presents the results of examining the doses effect of the preparation from ash and slag and technical fertilizer on the biological activity of ordinary chernozem and the yield of oil flax. The experiments were carried out on the experimental field of the Educational-Scientific-Production Center "Elite" of Sh. Ualikhanov Kokshetau University. The microbiological activity of the soil was determined by the method of application of flax. It has been established that the application of the preparation made from ash and slag and carbon black contributes to the activation of microbiological processes in ordinary chernozem and an increase in the yield of oil flax.