Question

The Northern Maidan in Karnataka is the vast plain land with _____________.
A. Red soil
B. Laterite soil
C. Black soil
D. Coastal alluvial soil

Answer 1

Hint: The soil found in the Northern Maidan region of Karnataka is formed by the weathering of the solidified lava spread over large areas of the Deccan Trap.

Complete answer: It is a huge plain land with black soil and is an extensive plateau which is around 365 to 610 meters above sea level. Slopes and hillocks can be seen in different places. Naragund hill, Gurmitkal Gudda, Parasagada Gudda and Ilkal Gudda are some prominent places found in this region. This region is known as the ‘land of sunshine’ because of its hot summer temperature.

Now let us examine the options
Option A - Red soils are formed by the weathering of igneous rocks of the old Gondwanaland. It is mostly found in the region spread all over south Bihar, Jharkhand, Orissa, Chhattisgarh, Tamil Nadu, east Andhra Pradesh and also in Karnataka.
Option B - Laterite soils are formed by the leaching process mostly found in heavy rainfall regions. The regions where laterite soils are mostly found include Andhra Pradesh, Chota Nagpur plateau, Sahyadris of the Western Ghats and Tamil Nadu.
Option C - Black soils formed by the weathering of the solidified lava. It can be found in the northern maidan regions of Karnataka and also in the Deccan Trap regions of Maharashtra, Gujarat and Madhya Pradesh.
Option D - Coastal alluvial soil is formed by the deposition of silt by the river along its banks. These soils occupy a broad belt between foothills of the Himalayas and Peninsular Plateau from north to south.

Thus, the correct answer is option c..

Note: The soil found in the Northern Maidan regions of Karnataka is very fertile and it does not require manuring. Soil nutrients such as magnesium carbonate, calcium carbonate and iron contents are found in abundance.