ИСТИНА

The water regime determines the signs of hydromorphic soils. Main features of water regime of light grey forest soils displaying different gleyization rate in years with different moistening were studied. Two layers of surface water appear in gleyish soils in spring and fall, hence, the yields decrease or crops die. Drainage is shown to eliminate surface water. Ceramic trench and plastic nontrench drainage exert similar agroecological and hydrological effects on the soils under examination. The estimation of diagnostic criterion – of the bogging index on drained soils