Consider the following statements 1 Alluvial soil is also known as lsquo self ploughing rsquo soil 2...........

Geography World - Soil and Vegetation

Consider the following statements:

1. Alluvial soil is also known as ‘self-ploughing’ soil.

2. Black soil is important for growing of plantation crops.

3. Saline soils are found in arid and semi-arid regions, and in waterlogged and swampy areas.

Which of the statements given above is/are correct?

1 and 3 only

1 and 2 only

3 only

1,2 and 3

The black soils are generally clayey, deep and impermeable. They swell and become sticky when wet and shrink when dried. So, during the dry season, these soil develop wide cracks. Thus, there occurs a kind of ‘self ploughing’. Hence, statement 1 is incorrect.
Black soil is important for growing of crops like cotton and sugarcane. Laterite soil is more suited to grow plantation crop. Hence, statement 2 is incorrect.
Saline soils are also known as Usara soils. Saline soils contain a larger proportion of sodium, potassium and magnesium, and thus, they are infertile, and do not support any vegetative growth. They have more salts, largely because of dry climate and poor drainage. They occur in arid and semi-arid regions, and in waterlogged and swampy areas. Hence, statement 3 is correct.