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This work is the result of the implementation of the following projects: "Scientific support for climate change adaptation in agriculture and the mitigation of soil degradation" (ITMS2014+ 313011W580) it was supported by the Integrated Infrastructure Operational Programme funded by the ERDF (2020-2023); and VEGA 1/0102/21 (2021-2023); Reducing chemical loads and the degradation of agricultural and forestry soils by selecting the appropriate agri-technology with regard to climate change and KEGA 016SPU -4/2021 (2021-2023). The implementation of modern educational approaches and tools in order to enhance creativity and the practical skills of graduates with a special focus on the application of agricultural and forestry science.A b s t r a c t. There are increasing demands to increase the productivity of crops grown in unfavourable soil conditions. The objective of this study was to evaluate the potential of biostimulants to improve soil properties and crop yields. A field experiment was conducted to assess the impact of Neosol (a soil activator), biostimulant Explorer (a rhizosphere activator) and AKEO (mineral fertilizer activator, Olmix Group) on soil in terms of the yields of spring and winter wheat and winter rape. Numerous soil characteristics related to soil structure were evaluated at the 0-20 and 20-40 cm depth ranges e.g. bulk density, soil porosity, structural coefficient. The results show that the application of biostimulants has a positive effect on soil bulk density, porosity and the structural coefficient. The biostimulants had a positive effect on the yields of crops.K e y w o r d s: biostimulants, soil-oxidizable carbon, soil quality, soil organic matter, drought, crop yield

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