The article presents information on morphological structures, general physical and agrochemical properties of typical irrigated gray and grassland soils. The general physical properties of the soil are that in typical gray soils the bulk density decreases and the porosity increases, while in grassland soils the bulk density decreases and the total porosity increases compared to typical gray soils. A typical irrigated gray soil is composed of large dust particles according to its mechanical composition and belongs to the category of medium sandy loam. According to the level of availability of humus and nutrients of the studied soils, typical gray and meadow soils irrigated are low in humus (0.36-0.87%), very low in mobile phosphorus (5.33-15.60 mg/kg), exchangeable potassium It is highlighted that it is provided with low (100-200 mg/kg).

This article illustrates a number of experiments to conduct research on agronomic techniques of seedling cultivation from the seeds of smooth licorice (Glycyrrhiza Glabra L). The analysis of research results on the effect of irrigation regimes on the growth and development of smooth licorice seedlings, the analysis of experimental work on the effects of smooth licorice irrigation regimens and mineral fertilizer rates on winter wheat yields was carried out. The cost effectiveness of growing seedlings from smooth licorice seeds was also studied by analyzing the results of irrigation procedures, determining the effect of soil processing methods, development and yield of winter wheat sown as a successive crop during cultivation of licorice saplings, and yield of roots in conditions of irrigated typical sierozem soils of the Tashkent province.

This article considers the effective effect of mulching of irrigated typical gray and meadow soils with plant residues and application of various fertilizers on soil fertility, mulching of typical gray soils with plant residues and application of various fertilizers (organic fertilizers, biohumus and biopreparations) in meadow soils. The effect on microbiological activity was determined. The application of various fertilizers (organic fertilizers, biohumus and biopreparations) to typical irrigated gray and meadow soils and mulching of the soil with plant residues have been shown to affect the growth and yield of winter wheat and cotton.

Biological preparations developed on the basis of biological methods have been considered the mainstay in the protection and fight against various diseases occurring in plants. It has been proven that the main resource in strengthening the biological condition and fertility of the soil is closely related to the life of saprophytic microorganisms. In this place, microorganisms and microbiological processes in the soil have performed an important task. In particular, it has the characteristic of enriching the soil with biological nitrogen due to the normalization of organic matter in the soil, assimilation of free nitrogen in the air by nitrogen-receiving microorganisms. In the article, it was observed that the amount of microorganisms in the composition of typical irrigated gray and meadow soils changes according to the seasons. It was explained that the highest amount of microorganisms was determined in the spring season, it decreased in the summer season, in autumn, the soil temperature and air temperature increased the amount of microorganisms, and in this season, if the activity of microorganisms is observed in the 0-30 cm layer of the soil, it was observed that it decreases towards the lower layers.