Role of Selected Agrotechnological Factors in Agriculture Biologization
The effect of crop rotation type, basic tillage methods, organic and mineral fertilizers, and their combinations on the dynamics of soil humus has been studied in long-term stationary experiments in the southwestern part of the Central Chernozemic Zone during 2 cycles of 5-course crop rotations. The type of crop rotation and fertilization had the strongest effect on this process. The positive balance of humus without fertilization has been obtained only in the crop rotation with 40% of perennial leguminous grasses; a simple reproduction of humus in crop rotations with 40-60% of row crops has been obtained at the application of manure at 8 t/ha, and an expanded humus reproduction at 16 t/ha