The importance of organic fertilizers in increasing soil fertility is great. The article focuses on the significance of organic fertilizers in increasing soil fertility, and it examines the conditions for applying organic fertilizers to protect productivity, product quality indicators, and soil fertility. Leguminous plants are essential in addressing food shortages and protein issues, which require increasing their productivity by cultivating fertile land. The application of organic fertilizers increases soil fertility, enabling ecological product production. Consequently, a research study was conducted on gray-meadow soils irrigated since ancient times to assess the impact of applying organic fertilizers at different rates on soybean plant productivity and soil fertility. The study results indicate that applying 20 tons of semi-rotted manure per hectare increased soybean plant productivity by 11 s/ha or 52.38% compared to the control option without fertilizer. Mathematical calculations also show that the grain yield obtained from soybean plants due to applying organic fertilizer norms is reliable. Additionally, the organic fertilizer norms led to an increase in the root and shoot residue of soybean plants, positively affecting soil fertility restoration by increasing the quantity of organic biological substances in the soil. In conclusion, applying 20 tons of semi-rotted manure per hectare on gray-meadow soils that have been irrigated for a long time and lack nutrients can increase soybean plant productivity and maintain soil fertility. Keywords: Soybean, legumes, soil fertility, organic fertilizer, productivity, root mass.