Every piece of land is planted with crops even along hill slopes which have no water retention ability and the yield from such dry soil is minimal. In 1995 when this picture was taken there was a drought in the Weifen River watershed, and the crops planted on the slopes were lost.

The gully floor is better endowed in terms of soil moisture. Here we see a luscious growth of corn during the 1995 drought. Gully floor is however threatened by floods. Major floods occurring once in 5 or 10 years can do substantial damages to the gully floor. In the picture we see the scar left on the ground due to floods in the past. On the bottom-right of the picture, the slope of a low wraping dam can be seen. The warping dam is used to control flood and to retain sediment brought down by the flood water.

Picture source: George Leung (1995)