Evaluation of the Informative Value of the Results of Soil Observations in a Stationary Experiment

The effective and potential fertility of leached chernozem was evaluated in a field stationary experiment at the Central Experimental Field of the Kurgan Research Institute and the application of 2 crop cultivation technologies. In the first part of the experiment, the corn–wheat–wheat–oat crop rotation was studied during annual plowing, in the second – permanent wheat after a stubble background. The first technology was characterized by higher effective fertility, a large number of plant residues, due to which its advantage was manifested in terms of humus content. The positive effect of fertilizers on the indicators of potential soil fertility was manifested when applying the 2nd and 3rd doses of nitrogen against the background of the use of phosphorus.