CHANGES IN THE FERTILITY OF LEACHED CHERNOZEM DURING LONG-TERM APPLICATION OF MINERAL FERTILIZERS

The article presents the results of scientific research on the effect of long-term use of mineral fertilizers on the fertility of leached chernozem. Over 25 years of direct action of phosphorus fertilizers in leached chernozem, the content of available phosphorus on fertilized soils at the beginning of the experiment increased from 67 mg/kg to 200 mg/kg against the background of the maximum dose of phosphorus fertilizers (P3). Over the next 25 years of the aftereffect of phosphorus fertilizers, as a result of the removal of nutrients by crop harvests, the content of phosphorus and potassium in the soil decreased noticeably. The acidity of the soil solution has increased, which is global character and does not depend on fertilizers.