Question

Which of the following soils are less fertile and need heavy manuring and irrigation?
a. Alluvial soil
b. Black soil
c. Red soil
d. Khadar soil

Answer 1

Hint:
The Indian Council of Agricultural Research (ICAR) set up an All India Soil Survey Committee in 1953 which separated the Indian soils into eight significant types. They are (1) Alluvial soils, (2) Saline and Alkaline soils, (3) Red soils, (4) Arid and Desert soils (5) Forest and Mountain soils, (6), Laterite and Lateritic soils, (7) Black soils, and (8) Peaty and Marshy soils.

Complete solution:
The red soils are poor in lime, magnesia, phosphates, nitrogen, and humus, yet are genuinely wealthy in potash. In their chemical structure, they are principally siliceous and aluminous; with free quartz as sand the alkali substance is reasonable, a few sections being very wealthy in potassium.

The surface of these soil differs from sand to earth, the greater part being soil. On the uplands, the red soils are flimsy, poor and gravelly, sandy or stony and permeable, however, in the lower territories, they are rich, profoundly dull, and ripe.

The red soils react well to the correct utilization of manures and water systems and give amazing yields of cotton, wheat, rice, beats, millets, tobacco, oilseeds, potatoes, and organic products.

The primary parent rocks are corrosive stones and gneisses, quartzitic, and feldspathic. The shade of these soil is by and large red, frequently evaluating into earthy colored, chocolate, yellow, dark, or even dark. The red tone is expected more to the wide dissemination instead of to the high level of iron substance.

Hence, the correct answer is option C.

Note:
The red soils involve an immense region of about 3.5 lakh sq km which is about 10.6 percent of the all-out topographical zone of the nation. These soils are spread on nearly the entire of Tamil Nadu, portions of Karnataka, south-east of Maharashtra, eastern pieces of Andhra Pradesh and Madhya Pradesh, Chhattisgarh, Orissa, and Chota Nagpur in Jharkhand.