In order to improve soil fertility and to increase the yield of agricultural products, the soil should be regularly enriched with mineral fertilizers. Famous machines and implements for soil mineral fertilizers differ in their insufficient measuring devices. The new structure of a seeding device with a compensating chamber for inserting fertilizers is considered in this article. A scheme of a seeding device and a 3D model of the seeding device are provided. This performance of the seeding device ensures uniform distribution of the fertilizers in the soil, by the width of the machine, thereby increasing the quality of the process implementation.