Results of a long-term field trial on a silt loam soil near Freising (Upper Bavaria) show that evaluating the meliorative effect of liming on soil structural properties depends on the initial homogeneity of the soil within the study area as well as on the method of determination. In a percolation test, liming increased stability of aggregates 1-2 mm in size and, thus, decreased sealing hazard of the top soil (0-4, 4-10, 10-20, 20-30 cm). In the test of soil settling, stability of aggregates 5-8 mm in size was not affected. The decreased sealing, observed also in the field, enhanced emergence.