Page 229 - New Medley 5 Semester 2

 Terrace farming: On hill slopes, farming is

done by cutting steps and terraces. is is
called terrace farming. It reduces the speed

of owing water and thus the amount of soil

owing downhill with water.

 By growing grass: When the land is not being

used for farming, it is good to grow grass or

some creepers on it. e grass has spreading
brous roots. It covers the topsoil quickly,

keeps it wet and holds it rmly.
 Constructing dams and Embankments: Floods Terrace farming on hill slopes
include huge quantities of running water that

wash away a large part of the topsoil. Dams
and embankments are built on rivers to check

soil erosion by oods.

Knowledge Zone
To encourage afforestation among children, A dam helps prevent soil erosion.
Vanmahotsava is celebrated in schools.

SOIL POLLUTION

Various human activities like dumping of solid, non-biodegradable wastes such

as glass, plastics, polythenes, etc. on land cause soil pollution. e polluted land
becomes less fertile. Excessive use of pesticides and chemical fertilisers by farmers

is also a major cause of soil pollution. e soil pollution ultimately makes the
land barren.

2 • Remembering

Answer in one word.

1. Planting trees in large numbers
2. Farming on hill slopes

3. Protection of soil from erosion
4. Dumping harmful substances in soil

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