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Terracing is an affective method of soil conservation:

A.	Desert areas	B.	Hilly areas
C.	Plains	D.	Riverine areas

Which is the main causative factor for desertification?

A.	Irrigated agriculture	B.	Overgrazing
C.	Tourism	D.	Developmental activities

Deforestation may reduce the chances of:

A.	Rain fall	B.	Frequent cyclones
C.	Erosion of surface soil	D.	Frequent landslides

Deforestation causes:

A.	Soil erosion	B.	Pollution
C.	No floods	D.	None of these

One of the following crops is the most effective in controlling soil erosion:

A.	Cotton	B.	Pigeon pea
C.	Green gram	D.	Maize

Sheet erosion is caused by:

A.	Fast running rivers	B.	Wind
C.	Heavy rains	D.	Glaciers

Soil conservation means:

A.	Prevention of spread of desert	B.	To check soil erosion by wind and rains
C.	To check soil erosion by afforestation	D.	All of these

Soil conservation can best achieved by having:

A.	Wind screens	B.	Good plant covers
C.	Restricted human activity	D.	Low rainfall

Main indicator of soil erosion is:

A.	Deforestation	B.	Afforestation
C.	Ozone layer	D.	Goats and grazing animals

10.

Dark coloured soils are considered most fertile as they contain:

A.	Gravel and sand	B.	Sand and calcium
C.	Clay and humus	D.	Silt and earthworms