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Transcript
THE EFFECT OF
AGRICULTURE
Soil erosion is the removal of the
fertile topsoil by the weathering action
of rain and wind. Soil erosion is
enchanced by poor agricultural
practices.
monoculture on the same
piece of land will
exhaust certain
essential mineral salts
and the land become
infertile, erosion will
occur easily
using inorganic fertilizers
can increase the nutrients
content of soil,but
extensive use will worse
the texture of the soil
until the land become
useless
the removal of hedges
surrounding the fields for
large-scale farming lead to
soil erosion easily due to
the removal of the wind
break, mechanical ploughing
loosens soil and speed up
erosion
overgrazing


Too large a population of animals (sheeps)
rearing on a piece of grassland will destroy
the growing points of grasses due to
overgrazing. Without plant cover, the land
easily erodes.
The trampling of such a large population of
animals on soil rapidly compacts it into a
hard layer that can hardly absorb any rain.
The dry soil is easily blown away.
Problems resulting from soil
erosion


)There is a loss of valuable agricultural land.
)The soil washed down to rivers may lead to
flooding.