This paper presents the results of a study aimed at determining the effectiveness of using bird droppings as an organic fertilizer to preserve soil bioresources and soybean productivity. The study was conducted in 2020-2021 in field experiments in the northern forest-steppe zone of the Ob surroundings in the Novosibirsk region (Russia), on experimental plots with leached, medium-thick, medium-loamy chernozem. In the conditions of the forest-steppe zone of Western Siberia, the effect of the use of preparations based on chicken manure applied under soy was obtained. It has been established that the pre-sowing introduction of preparations into the soil and vegetation treatment activates the vegetative development of plants and contributes to an increase in the yield of green mass and grain. As a result of the application of fertilizers, the safety of plants for harvesting increases by 2-4%