This study determined infiltration into soils on black farmland under different tillage systems by long-term experiment. The moldboard plough and rotary tillage being representative of conventional tillage systems induced a lowest bulk density in ridge. Surface stable infiltration rates under moldboard plough and rotary tillage were 9.20 and 7.31 mm/min

respectively

which were higher than the others. Although no-tillage induced a higher bulk density in ridge and furrow

it had a relatively high stable infiltration rate. Re-duced tillage could significantly increase stable infiltration rate in furrow because it loosed the furrow in sum-mer. These indicate that no-tillage and reduced tillage are effective tillage systems of soil and water conserva-tion.