Removal of the soil by the action of wind and water is known as

(1) Erosion

(2) Fossilization

(3) Leaching

(4) Calcification

Domestic waste will lead to : 

1. Biodegradable pollution

2. Nondegradable pollution

3. Thermal pollution of soil

4. Air pollution

Soil erosion is greater when

(1) No rain occurs

(2) Winds do not blow

(3) The rainfall is evenly distributed

(4) The Rainfall is received in heavy down pour

Soil erosion can be prevented by : 

1. Overgrazing

2. Removal of vegetation

3. Afforestation (Plantation)

4. Increasing bird population

Soil conservation is the process where

1. Soil is aerated

2. Soil erosion is allowed

3. Soil is protected against loss

4. Sterile soil is converted into fertile soil