Gully erosion, which has created the ravines locally called bihad, is a serious soil problem along which river of Rajasthan?
- A.Luni
- B.Banas
- C.Chambal
- D.Mahi
Correct answer
Explanation
The correct answer is C, the Chambal. Where the Chambal runs through the soft alluvium of Dholpur, Karauli and Sawai Madhopur, the monsoon run-off cuts deep channels that widen year after year into the badlands called bihad, taking farmland out of use and giving the area its old reputation as a hiding place for outlaws. Option A, the Luni, flows through sandy western Rajasthan, where the problem is wind erosion and salinity instead. Option B, the Banas, the largest river wholly inside the state, carries silt but no ravine belt of this scale. Option D, the Mahi, drains the southern Vagad region of Banswara and Dungarpur. Remember the pairs: wind erosion in the west, gully erosion along the Chambal in the east. The ravines are worked on under soil conservation schemes with check dams and plantations, a step often asked along with the districts.
Read the full article: Climate and Soils of Rajasthan: Rainfall, Loo and Mawath
Practice Questions
View allWhich district of Rajasthan receives the lowest average annual rainfall?
- A.Churu
- B.Jaisalmer
- C.Bikaner
- D.Nagaur
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It lies in the extreme west of the state, farthest from both branches of the south-west monsoon, and parts of the district record under 200 millimetres a year, which is why the sand dunes there are the largest and the most mobile in Rajasthan.
Read the full explanation →The light winter rainfall caused by western disturbances in Rajasthan is locally known as
- A.Loo
- B.Andhi
- C.Mawath
- D.Sem
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These are the showers of December to February, brought by western disturbances that travel from the Mediterranean across Iran and Pakistan into north-western India, and they are valued because they water the standing rabi crops of wheat, gram, barley and mustard without any cost to the farmer.
Read the full explanation →The Tropic of Cancer passes through which district of Rajasthan?
- A.Banswara
- B.Jhalawar
- C.Dungarpur
- D.Udaipur
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The Tropic of Cancer crosses the southern part of Banswara, the southernmost district of Rajasthan, so the whole of the state except that small corner lies north of the tropic, in the subtropical belt.
Read the full explanation →Medium black soil in Rajasthan is found mainly in which region?
- A.Shekhawati
- B.Hadoti
- C.Marwar
- D.Mewat
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The soil there is formed from the weathering of the basalt of the Deccan trap, so it is clayey, holds moisture well and cracks in summer, and it carries the state's soybean, cotton and wheat.
Read the full explanation →Which soil covers the largest area of Rajasthan?
- A.Alluvial soil
- B.Red and yellow soil
- C.Sandy or desert soil
- D.Medium black soil
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The Thar desert and the arid plains west of the Aravalli take up the greater part of Rajasthan, and their soil is overwhelmingly sand, low in nitrogen and organic matter, porous so that water sinks away quickly, but often well supplied with lime and phosphate.
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