Dry land farming in India is largely confined to areas with rainfall less than
- A.100 cm
- B.85 cm
- C.80 cm
- D.75 cm
Correct answer
Explanation
The correct answer is D, 75 cm. Dryland farming is practised where annual rainfall is below about 75 cm. Indian agriculture is grouped by the source of moisture into irrigated and rainfed farming, and rainfed farming is further divided into dryland and wetland farming. In dryland areas the rainfall is too little and too uncertain for water-hungry crops, so farmers grow hardy, drought-resistant crops such as jowar, bajra, ragi, moong, gram and guar, and use soil-moisture conservation and rain-water harvesting. Such areas cover large parts of Rajasthan, Gujarat, the interior Deccan and the rain-shadow regions of the Western Ghats. Wetland farming, in contrast, is found where rainfall exceeds the soil's moisture needs during the rainy season, and it grows crops such as rice, jute and sugarcane. Option A is wrong because 100 cm is well above the dryland limit. Option B is wrong because 85 cm is not the accepted limit. Option C is wrong because 80 cm is also above the limit. Exam tip: dryland farming below 75 cm of rain, with millets and pulses.
Practice Questions
View allWhich one of the following is not a minor plate ?
- A.Cocos Plate
- B.Nazca Plate
- C.Caroline Plate
- D.Antarctic Plate
Show answer
The Antarctic Plate, carrying Antarctica and the ocean around it, is one of the seven major lithospheric plates. Plate tectonics divides the lithosphere into seven major plates and several minor ones.
Read the full explanation →Which of the following statements with reference to shadow zones in an event of an earthquake is/are correct ? 1. Zone between 105° and 145° from epicentre was identified as the shadow zone for both P-waves and S-waves 2. The shadow zone of P-waves is much larger than that of the S-waves Select the answer using the code given below:
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Show answer
The band between 105° and 145° from the epicentre receives neither P-waves nor S-waves, but it is the S-wave shadow zone that is much larger, so statement 2 is wrong.
Read the full explanation →Which of the following statements about Ring of Fire is/are correct ? 1. It is a zone of convergence plate boundaries 2. It is an active seismic and volcanic zone 3. It is associated with deep trench Select the correct answer using the code given below :
- A.1 and 2 only
- B.2 and 3 only
- C.1 only
- D.1, 2 and 3
Show answer
The Ring of Fire around the Pacific is a belt of convergent plate boundaries, full of active volcanoes and earthquakes and lined by deep ocean trenches.
Read the full explanation →Which one of the following rivers is not a tributary of river Brahmaputra ?
- A.River Manas
- B.River Kameng
- C.River Mahananda
- D.River Subansiri
Show answer
The Mahananda rises in the Darjeeling hills, flows through north Bengal and Bihar and joins the Ganga, not the Brahmaputra.
Read the full explanation →Which of the following statements regarding tropical cyclones is/are correct ? 1. These storms develop during the summer and autumn in every tropical ocean except the South Atlantic and eastern South Pacific Oceans. 2. Tropical cyclones that occur in the North Atlantic and eastern North Pacific Oceans are known as typhoons. 3. Tropical cyclones that occur in the Indian and South Pacific Oceans are called cyclones. Select the answer using the code given below :
- A.3 only
- B.1 and 2 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Tropical cyclones of the North Atlantic and eastern North Pacific are called hurricanes, not typhoons, so statement 2 is wrong.
Read the full explanation →