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Soil
is important
because it is one of the
partners in
our natural environment. It
helps shape our
planet into a habitat for all living
things. Without
soil, the other partners of
our natural environment will be affected as well. No living thing would
be able to survive on this planet without soil.
Soil provides us with many
things, probably more than you think. Much of the food
we eat, directly, either grows in soil, or indirectly, comes from
animals that eat
plants, or from animals that eat other animals that eat plants. Plants
that are used as herbs also grow in soil. They are used to make
medicines, which help us cure sickness.
Likewise, it is also the home to billions of organisms and
microorganisms,
which also help us make antibiotics. Fungi and bacteria are the most
known poducers of these antibiotics. For example, penicillin is one of
these produced by fungi.
Carbon is one of
soil's essential
elements. It is very important to healthy soil. Grasslands and
forests release carbon into the atmosphere, which increases the carbon
dioxide. However, soil can absorb lost carbon
from the atmosphere.
Ironically, this
is the same soil that is beginning
to get endangered. The reason is
because of the chemicals we use
to
produce vegetables and fruits faster. The amount of soil that is fertile for growing crops is
now only one quarter of the earth, which
is a
very small amount. If we don't do anything about it eventually
our soil won't be fertile anymore. Then the plants, animals, and the
air
will be
affected. The human race as we know it today won't exist.
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Causes of Soil
Erosion:
Soil
erosion can
happen so slowly that it's barely noticeable, or it can even happen
overnight. Some of the causes of erosion are floods, severe
storms, tornadoes, hurricanes, etc. For example, during a
hurricane, water mixes with soil to form mud, which causes rivers to
swell and create damage downstream. One of the major causes of erosion
is the removal of plants. Plants provide a protective cover on the land
and prevent erosion from occurring. Plants slow down water as it flows
and plant roots hold on to the soil to keep the soil from moving
downhill with surface runoff.
Soil
Conservation:
Soil
Conservation
methods stop, or at least slow down erosion from occurring. One way to
conserve soil is by making windbreaks.
Windbreaks stop the wind from
blowing straight across a field. This method involves planting
rows of trees perpendicular to the direction of the prevailing
wind. Another way to prevent erosion is by making sure that there
are always plants growing and by mixing different types of plants to
grow
together. One important rule is to not plant the same crops every year.
This is called crop rotation. Planting every year will make the
soil lose all its nutrients.
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