Keywords:  water resistance, water resistance coefficient, water-resistant aggregates, eroded soils, crop rotation, fertilizer system

Мелиорация.– 2024. – №1 (107). – P 56–64

The influence of crop rotations and fertilization systems on the water resistance of soil structure was studied. Soddy-podzolic soils on moraine loams were characterized by better water resistance compared to soils on loess-like loams. Non-eroded, weakly and moderately eroded soils in the grass-grain crop rotation had good water resistance (40.7–48.9 %), moderately eroded soils in the grain-grass crop rotation and highly eroded soils in the grass-grain crop rotation – satisfactory (34.8–38.4 %). Soddy-podzolic soils on loess-like loams were characterized by unsatisfactory water resistance. The organomineral fertilizer system, together with liming, improved the water resistance of soils. Compared to the mineral fertilizer system, the water resistance of non-eroded soil increased from 19.9 to 24.8 %, moderately eroded soil – from 12.5 to 18.5, highly eroded soil – from 12.5 to 16.0 %. The weighted average diameter of water-resistant aggregates of soddypodzolic non-eroded soils on loess-like loams averaged 0.4 mm, and of moderately and highly eroded soils – 0.3 mm. Soils formed on moraine loams had higher values of this indicator, especially in grass-grain crop rotation
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