The article considers the issues of determining the rational plots of irrigated plots on lands inhabited and subjected to irrigation erosion. Rational areas of irrigated plots are determined based on the optimal aspect ratio of the irrigated plots, the degree of salinity of soils, the slope of the irrigated surface, and the flow rate of water in irrigated furrows. The optimal combination of irrigators and drains, which are the boundaries of irrigated plots and optimal distances between drains, were also taken into account. Recommended rational areas are defined for slightly, medium, and highly saline, as well as lands subject to irrigation erosion.