Three management techniques to control soil erosion.
- Contouring
- Strip cropping
- Terracing
Contouring:
Contouring is also known as contour farming. It is used in conducting
operations on field which include planting, harvesting and tillage. It is
useful in reducing surface runoff by making the water to flow
into small
depressions. It is helpful in reducing soil erosion. It is also useful in
conservation of water.
Strip
cropping:
It is a type of practice in which growing alternate strips of different
crops in the same field. Rotation of
crops takes place in this strip cropping. This rotation provides strips which
help in growing different types of grasses and legumes which are helpful in
reducing the erosion which is caused by water. Maximum length of slopes which
are used in strip cropping is twice those for which is used in contouring
alone. These strips which are having grass are used in reducing overland flow
velocity and there is a possibility of increasing in filtration. By this
infiltration velocity of water which is entering into the next strip also gets
reduced which is useful in reducing soil erosion.
Terracing:
It is a process in which terraces are constructed on slopes which are eroding.
These terraces are used for reducing runoff and also length of slope. The
channel of terrace is leveled or made available to direct runoff to subsurface
drains which make this runoff away from these areas. If a terrace is leveled
the movement of water in lateral direction is reduced. So it is good to use
this terracing on highly infiltrated soils as there is no movement of water
infiltration takes place easily which is helpful in reducing soil erosion.
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