The authors investigated the humus horizon (0–20 cm) of rusty soils in period of
agriculture use (winter barley crop) and after 8–10 years since its use abandonment. Those
soils had texture of heavy loamy sands. The fallow soils had the lower content of available
potassium, the lower values of pHKCl and bases saturation (V). The contents of available
phosphorus and magnesium, exchangeable aluminum and organic carbon were higher than in
period of agriculture use. The authors also ascertain the improvement of soil susceptibility on
physical degradation – S(f) and destruction of structure (RDC).