In the case of saline soils of the north zone of Karakalpakstan, it is important to study the influence of growing maize and corn as rotational crops after winter wheat on the continuation of the vegetation period and cultivating the soil. Under these conditions, after the winter wheat, when the soil is cultivated in good quality in the production of maize and corn as rotational crops, maize and corn grow well and there is a large amount of fodder from green mass for livestock.