Research was carried out on changes of the structure and physical condition of arable grey-brown podzolic soil, derived from silt formation, planted with onion. During die analysed period (12.04. - 20.07.1990) a crust repeatedly formed on the soil surface. Even though the crust was systematically removed, using hand- and horse-tools, it quickly reappeared because of rainfall. The crust did not have much influence on worsening the soil ability to respirate. Rain also caused the destruction of die aggregate structure and increased the density of the 0 - 8 cm layer, which was, subsequently, successfully restored by cultivation. The physical state of the soil during the analysed period was considered positive for the growth and development of plants.