The disused sandy soil districts of the Yellow River suffer comparatively serious soil and water loss. The result of soil erosion in different underlying surfaces and slope surfaces is obtained through the 2006's observation from the experimental station of soil and water loss. According to the statistical data of 2006's observation from the three runoff plots in upstream

middle-stream

and low-stream of the disused districts of the Yellow River

the soil erosion module from ordinary farmland is found to be 1 191~2 714 t/km2 per year; from forestland

550~1 157 t/km2 per year; and from gully-slope land

7 779~8 658 t/km2 per year (for slope degree between 17° and 22°). The soil erosion module from artificial disturbed farmland is 2 to 4 times that from undisturbed farmland.