Abstract
Abstract Sorghum can be sown after any crop in a field rotation, but in fields that are free of weeds. Sorghum is easy to grow in a wide variety of soil and climate conditions. Most often, it is cultivated in arid conditions, which is its clear advantage over other crops. These studies were conducted from 2019-2021. at the station in LLP “Ural Agricultural Experimental Station”, deployed in time and space, grass-field crop rotation, where the predecessors for sorghum were a mixture of perennial grasses of the fifth year of life. Before sowing sorghum, a background agrochemical characterization of the soil was carried out at 20 and 40 cm. In the studies, appropriate agrotechnics for sorghum cultivation were applied. The use of crops of perennial grasses consisting of cereal-legume phytocenoses (wheat grass, sainfoin, alfalfa) in grass-field crop rotations is promising from the point of view of further application of chemical means of protection against weeds, but also increasing soil fertility due to the organic matter of crop rotation crops.