Page 153 - Science Class 07

AFFORESTATION

Afforesta on is the process of plan ng trees,
or sowing seeds, in a barren land devoid of
trees to create a forest. The term should not
be confused with reforesta on which is the
process of specifically plan ng na ve trees
into a forest that has decreasing numbers of
trees. While reforesta on is increasing the
number of trees of an exis ng forest,

afforesta on is the crea on of a 'new' forest.
Soil erosion due to deforesta on.
Forest Conserva on

As our need for land for housing and farming so that new trees can grow. This way the forest
and that for wood for fuel and construc on cover is maintained.
grow, we cut down more and more forests. Protec on from Fire
This is known as deforesta on. This has a Huge forest areas are destroyed by fire every
harmful impact on the environment. Hence, year. Fire may occur due to the carelessness of
there is a constant need to manage forests people, or due to lightning during a storm or by
carefully to conserve them. fric on between dry stems and dry branches of

Planned Harves ng trees.
An efficient way to get wood from forests for Forest fires are controlled by spraying fire
our requirements is to cut only some of the ex nguishing solu ons from aircra s or by
trees in an area. The uncut trees prevent changing the direc on of wind by using strong
erosion. Fruits of these trees produce seeds blowers.

Environment : All the things present around us
Humus : Organic matter present in soil
Habitat : A suitable place where particular organisms grow, live and reproduce
Deforestation : Cutting down trees on a large scale

Timber : Wood which is used to make furniture, doors, windows, etc.
Afforestation : Growing new trees on barren land to regenerate forests

Sapling : A small or baby plant

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i Forests are useful in many ways.
i They help in maintaining environmental balance and also help in cycling nutrients.
i Forest improve the quality of soil by increasing its porosity and fertility by contributing
humus to it.

Science-7 153