Physical and Chemical Properties of Leached Chernozem under Different Soil Treatment and Fertilizer Application in Cropped Rotation Central Black Earth Region

In the zone of unstable humidification of the Central Black Earth Region in 1985–2021, in the steam link of the fruit-replaceable 9-pole crop rotation, the influence of dump, dumpless and combined soil treatments on non-ventilated and fertilized (N59P59K59 + manure 11 t/ha of crop rotation area) backgrounds was studied. The purpose of the work is to study the influence of basic tillage and fertilizer systems on the physico-chemical properties of the soil in 4 rotations. The soil is leached heavy loamy medium-sized chernozem with a humus content of 5.3–5.6% in the arable layer, with an average supply of nutrients and optimal physical properties. During the first 2 rotations, the pH_KCl indicator decreased by 0.04–0.46 units relative to the initial one. In the 4^th rotation, the actual acidity was 6.06–6.18 units. Minimal changes in acidity were noted during combined tillage. In the 4^th rotation, with combined tillage, the amount of absorbed bases increased to the greatest extent (by 10–12%). Physico-chemical properties in winter wheat crops were more favorable than in sugar beet crops. Soil buffering in the 4^th rotation tended to increase compared to the 2^nd rotation. The multi-depth dump treatment increased the buffering of the chernozem.