Based on the problems of serious soil and water loss on the sloping farmland in the gentle hilly region of the northern of song-nen plain,during the year of 2009 and 2010,the comprehensive technique model of combining engineering technology and farming technology was first used by natural rainfall to study,the runoff plots included five kinds of soil and water conservation technology modes of mole drain,the combination of mole drain and subsurface pipe,furrow damming,the combination of mole drain and furrow...