Which one of the following type of resource is iron ore?
(a) Renewable
(b) Biotic
(c) Flow
(d) Non-renewable
ANS (d) Non-renewable

Under which of the following type of resource can tidal energy be put?
(a) Replenishable
(b) Human-made
(c) Abiotic
(d) Non-recyclable

ANS (a) Replenishable

Which one of the following is the main cause of land degradation in Punjab?
(a) Intensive cultivation
(b) Deforestation
(c) Over irrigation
(d) Overgrazing

ANS (c) Over irrigation

In which one of the following states is terrace cultivation practised?
(a) Punjab
(b) Plains of Uttar Pradesh
(c) Haryana
(d) Uttarakhand

ANS (d) Uttarakhand

In which of the following states is black soil found?
(a) Jammu and Kashmir
(b) Gujarat
(c) Rajasthan
(d) Jharkhand
ANS (b) Gujarat

Maharashtra, Madhya Pradesh and Chhattisgarh are states having black soil.
Cotton is mainly grown in black soil.

Alluvial Soil is found in the river deltas of the eastern coast.
Three features of alluvial soil:
→ Alluvial soils are very fertile.
→ They are ideal for growing sugarcane, wheat and paddy.
→ The regions of alluvial soils are intensively cultivated and densely populated.

In hilly areas, soil erosion can be controlled by ploughing across contour-lines, making use of terrace farming techniques and using strips of grasses to check soil erosion by wind and water.