Abstract: From July to August, 1995, the biggest flooding in the a century occared in Shenyang region and thousands ha of farmland was damaged or warped. Average thickness of silting layer ranged from 20 to 40 cm. The contents of total N,total P, available N, available P, and available K within 0～60cm of warped farmland increased distictly. The micronutrient contents of B, Cu, Zn,Fe, and Mn increased by 200%～600%, and did not exceed the standard. Except that the bulk density of soil was on the high side and unsuitable for crop growth, other soil physical properties changed very little. If the requiste ameliorative measures are taken, the soil fertility of warped farmland would be superior to that of the normal farmland.

Key words: biological soil crust, biomass, soil texture, soil erodibility.