The purpose. To determine economic efficiency of new kinds of fertilizers at different times and ways of their entering. Methods. Field, statistical. Results. Results of field researches by efficiency of application of liquid organomineral fertilizers are brought. High efficiency and profitableness of fertilizers is shown at growing spring barley (net profit -1594-3731 hrn/hectare, level of profitableness -152 -231%). Conclusions. Additionally gained profit on application of liquid organomineral fertilizers is economically justified, but differs on the level of profitableness.

The intensification of crop production coupled with current declining soil fertility needs proper plant nutrition management and improved effectiveness of fertilizer use. Sustainable practices providing new soil amendments could be a useful tool to improve soil fertility and crop productivity causing economic benefits. The technology of processing local raw materials (leonardite, bentonite, and molasses) was developed to produce new soil amendments with optimal physical and chemical properties and to meet the needs of a particular crop in the nutrients. The best ratio of components was proved in a model experiment with an estimation of the full cost of final organic and organo-mineral soil amendments. In a field experiment, the effect of new soil amendments on available nutrients in Chernozem Podzolic and corn yield was studied. Two doses and methods of application (banding and broadcasting) of new soil amendments were compared taking into account its economic efficiency. Development of technologies to improve fertilizing properties of local organic materials, compliance to recommended doses, and methods of soil inputs application could increase the efficiency of crop production emerging environmental and economic benefits.

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The aim of this study was to determine the ability of soil improvers based on sapropel and biochar to adsorb macronutrients of mineral fertilizer. The composition of soil improvers varied in the volume ratio of sapropel and biochar. Sequential three-stage irrigation of various mixtures of sand and soil improvers after the application of mineral fertilizer was carried out using the column system. The content of mineral nitrogen, phosphorus and potassium in the filtrate and the initial mixtures was analyzed. The data on the dynamics of leaching out of ammonium and nitrate nitrogen from different mixtures (sand + soil amendment + mineral fertilizer) indicated that the most intensive leaching of NO3–N and NH4 – N occurred after the first irrigation. Increasing of sapropel content in the composition of soil improvers was correlated with the resistance to leaching out of mineral nitrogen from mixtures after irrigation. The ability of soil improvers to fix phosphorus increased in mixtures with the highest input of sapropel. Intensive leaching of potassium from soil improvers under irrigation was observed. Soil improvers with content of 90% of sapropel and 10% of biochar in case of its application into the sand in ratio 4:1 had the best sorption characteristic.

The mixture contain easily digestible form all 3 basic and Agrochemical Researches named after O.N. Sonutrients that significantly improve the quality of the kolovsky 4 Chaikovska Str.