Plant and Soil Science

 Crop productivity depends on the nutritional regime of the soil. Factors that affect the content of nutrients in the soil include various tillage systems. The article presents the results of studies of the effect of minimizing tillage in the Northern Steppe of Ukraine on the content of basic nutrients. In soil samples, the content of nitrate nitrogen was determined by potentiometric ammonia nitrogen with Nessler's reagent, mobile phosphates and exchangeable potassium according to Chirikov. Changes in the redistribution of their content in the 0-30 cm layer of chernozem ordinary with minimal and zero tillage were established. The highest degree of differentiation was noted for nitrate nitrogen: an increase in nitrates in a layer of 0-10 cm relative to a layer of 10-20 cm was 28.3 % for minimal processing and 42.3 % for zero; relative to the 20-30 cm layer, respectively 46.5 and 92.2 %. A decrease in the content of nitrate nitrogen by 6.0-14.5 %, an increase in mobile forms of phosphorus by 9.8 % and exchange potassium by 4.2 % while minimizing tillage was established.

minimization of tillage, zero tillage, minimal tillage, plowing, ordinary chernozem, plant nutrients