Date post: | 30-May-2015 |
Category: |
Technology |
Upload: | tianjiao03 |
View: | 1,244 times |
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SOIL EROSION
DEPLETION OF SOIL MATERIALS
•minerals can be
exhausted by
overproduction
•soil that is depleted of
minerals become acidic
or sour and causes
damage to crops
•lime and fertilizers are
added to the soil to
correct this condition
LOSS OF ORGANIC MATTER
• The organic matters on the
topsoil decays slowly.
• Humans may disturb the
this natural balance by
planting & harvesting
crops too frequently.
• Sometimes wood& native
grasses are burned down
before plowing.
EROSION
• a destructive process by
which soil is lost by water
& wind
• happens when poor
farming method are
applied
LEACHING
• When the field is plowed
before planting rain soaks
into the pulverized soil
easily.
• If the material in the topsoil
is not dissolved in water
plants can’t absorb them
thus the fertility of the soil
is lost.
SOIL PROBLEMS
can lead to water problems too
WATER PROBLEMS
Groundwater is depleted by humans through
overconsumption in cities and run-off water.
too much run-off water results from heavy rains
deep wells supply drinking water and draw
greatly on the supply of groundwater
WATER PROBLEMS
water problems caused by soil problems:1. droughts- aftermath of too much rain rushing
immediately to the sea since there are less trees to store water
2. flood- aftermath of denudation
these result from misuse of soil and its plant cover
(due to deforestation)
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