Question

Assertion (A): The lower horizons of the arid soil is occupied by kankar. Reason (R): It is because of the increasing- calcium content downwards in arid soil. A Both A and Rare true and R is the correct explanation of A B Both A and Rare true, but Ris not the correct explanation of A C A is true, but Ris false D A is false, but R is true


koi hai kya ??​

Answer 1

Nai bata sakti sorry...

Answer 2

Assertion (A): The lower horizons of the arid soil is occupied by kankar. Reason (R): It is because of the increasing- calcium content downwards in arid soil.

In this both assertion and reason are true.

• The dry soil is mostly red & brown in color, with a sandy texture.
• It is saline by nature. Evaporation happens at a quicker rate because of the dry environment and high temperatures. This soil is deficient in humus and moisture.
• The lower horizon of this soil is inhabited by 'Kankar,' which limits water infiltration due to the high calcium concentration.
• The soils have a large proportion of soluble salts. It also has a very low level of organic materials due to the arid environment and lack of flora.
• Since there is no rainwater to wipe away dissolved salts, the topsoil remains acidic. Crop failure & salt-tolerant dry crops like, cotton, barley, wheat, maize, millets, pulses, may be produced on these barren soils with the right fertilisers and irrigation.
• Like in the area of western Rajasthan, such soils become arable after sufficient irrigation.