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The authors found that in arid conditions in the cultivation of soybeans (soya), potato, spring wheat and corn without using fertilizers the content of mineral forms of nitrogen and phosphorus was low and very low. At that time, in fallow fields the ammonium nitrogen content was higher by an average of 6.8-9.2 mg/kg and reached a high level, nitrate nitrogen – by 2.6-5.3 mg/kg and reached an average level of security. The content of mobile phosphorus in all fields was very low and low (56.3-112.5 mg/kg). The content of exchangeable potassium was very high and high, and during periods of severe desiccation it increased by 2.3-1.6 times.

Nutrition regime in agrochernozems under cultivating field crops in arid conditions