Currently, potato production in Russia is considered one of the priority areas of crop production, since this vegetable crop has high nutritional indicators. The amount of potato consumption in the Russian Federation is comparable to the amount of bread consumed. Growing potatoes is considered less expensive and less time-consuming than producing other vegetables. However, like most cultivated crops, potatoes need additional irrigation. When growing potatoes on agricultural land, the optimal water regime in the soil is achieved through irrigation systems. During the design of irrigation systems, an important stage is considered to be (the calculation of the irrigation regime), since it determines the main characteristics of the elements of the irrigation system. Methods for calculating the design modes of potato irrigation systems that currently exist for the conditions of sod-podzolic soils of watershed territories do not fully take into account the complex processes of water consumption and water exchange in the soil layer. In this regard, there is a need to determine some of parameters, which include: humidity control ranges, the study of biological coefficients, as well as coefficients that take into account the type of soil and climate zone.