Geography

Soil formation processes

Q: What can cause salt accumulation in soil in dry regions?

High evaporation and low leaching Evaporation removes water and can leave salts near the surface. Exam tip: connect salinity with arid climate.

Q: Why can soil become acidic in high rainfall areas?

Basic elements move downward by leaching High leaching can reduce basic materials in soil. Exam tip: connect acidic soil with humid climate.

Q: Red color of soil may be related to what?

Iron oxide The direct answer is A: iron oxide. Soil may contain iron-bearing minerals. When iron is exposed to oxygen and moisture, it oxidizes, much like iron forming rust. This oxidized iron compounds can give soil a red, reddish-brown, or yellowish colour, depending on the minerals and drainage conditions. A is correct because iron oxide is a recognised cause of red soil colour. B is wrong because sound has no physical pigment and cannot colour soil. C is wrong because a sea fish is an organism, not the mineral cause of soil colour. D is wrong because a cloud is in the atmosphere and does not produce the red mineral colour in soil. The word oxidation means combination with oxygen in this context. Memory cue: red soil colour often suggests oxidised iron, like rust.

Q: Dark color of soil can generally show abundance of what?

Organic matter Dark color is often linked with presence of humus. Exam tip: treat color as a soil property indicator.

Q: How can aeration be in waterlogged soil?

Low Waterlogging fills pores with water instead of air. Exam tip: connect waterlogging with poor aeration.

Q: Transported soil forms from what material?

Deposits brought by an agent Water wind or glaciers can deposit material at another place. Exam tip: connect transported soil with carried material.

Q: Which type of soil can form from river deposited material?

Alluvial soil Rivers deposit sediment and form alluvial soil. Exam tip: connect alluvial soil with river deposition.

Q: What is fine dust like material deposited by wind called?

Loess Loess is a deposit of very fine silt and dust transported and laid down by wind, so it is the correct answer. A moraine is debris deposited by a glacier, whereas a delta forms at a river mouth. Exam tip: wind-made deposits are called aeolian deposits, and loess is a major example.

Q: What is the main characteristic of glacial till?

It is unsorted debris A glacier deposits particles of different sizes without sorting. Exam tip: connect till with unsorted material.

Q: Laterization is greater under which condition?

Hot humid climate Hot humid conditions cause intense weathering and leaching. Exam tip: connect laterization with tropical climate.

In this Class 11 Geography topic from Geomorphic Processes, students learn how soil develops through the weathering of rocks and the gradual interaction of parent material, climate, organisms, relief and time. The topic explains key processes such as the addition and loss of materials, transformation of minerals and the movement of clay and other substances within the soil profile. It also helps students understand soil horizons, profile development and the influence of erosion and drainage on soil formation.

Easy · Level 6 · 23 questions

Practice questions

01What can cause salt accumulation in soil in dry regions?

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Answer and explanation

Correct answer: A. High evaporation and low leaching

Evaporation removes water and can leave salts near the surface. Exam tip: connect salinity with arid climate.

Soil formation processes

Practice questions

01What can cause salt accumulation in soil in dry regions?शुष्क क्षेत्रों में मिट्टी में लवण जमा होने का कारण क्या हो सकता है?

02Why can soil become acidic in high rainfall areas?अधिक वर्षा वाले क्षेत्रों में मिट्टी अम्लीय क्यों हो सकती है?

03Red color of soil may be related to what?मिट्टी का लाल रंग किससे संबंधित हो सकता है?

04Dark color of soil can generally show abundance of what?मिट्टी का गहरा रंग सामान्यतः किसकी अधिकता दिखा सकता है?

05How can aeration be in waterlogged soil?जलभराव वाली मिट्टी में वायु संचार कैसा हो सकता है?

06Transported soil forms from what material?परिवहित मिट्टी किस पदार्थ से बनती है?

07Which type of soil can form from river deposited material?नदी द्वारा जमा पदार्थ से किस प्रकार की मिट्टी बन सकती है?

08What is fine dust like material deposited by wind called?हवा से जमा महीन धूल जैसे पदार्थ को क्या कहते हैं?

09What is the main characteristic of glacial till?हिमनदी टिल की मुख्य विशेषता क्या है?

10Laterization is greater under which condition?लेटराइटीकरण किस दशा में अधिक होता है?

11Which material accumulates during calcification?कैल्सीफिकेशन में कौन सा पदार्थ जमा होता है?

12Podzolization is more associated with which environment?पॉडजोलकरण किस पर्यावरण से अधिक जुड़ा है?

13Gleization is linked with which condition?ग्लीकरण किस स्थिति से जुड़ा होता है?

14Roots growing in rock cracks are an example of what?जड़ों का चट्टान की दरारों में बढ़ना किसका उदाहरण है?

15What effect can repeated heating and cooling have on rock?बार बार गरम और ठंडा होने से चट्टान पर क्या प्रभाव पड़ सकता है?

16How does freeze and thaw action help soil formation?जमाव और पिघलाव की क्रिया मिट्टी निर्माण में कैसे मदद करती है?

17Oxidation can help color change related to which mineral?ऑक्सीकरण किस खनिज से संबंधित रंग परिवर्तन में सहायक हो सकता है?

18In carbonation water becomes mildly acidic due to which gas?कार्बोनेशन में जल किस गैस के कारण हल्का अम्लीय बनता है?

19What do minerals do during hydration?हाइड्रेशन में खनिज क्या करते हैं?

20What is the simplest reason for soil conservation?मिट्टी संरक्षण का सबसे सरल कारण क्या है?

21Which is the correct simple sequence of soil formation?मृदा निर्माण की सही सरल श्रृंखला कौन सी है?

22How does mulching help in soil conservation?मल्चिंग मिट्टी संरक्षण में कैसे मदद करती है?

23Why is terrace farming useful for conserving soil on hill slopes?सीढ़ीदार खेती पहाड़ी ढालों पर मिट्टी बचाने में क्यों उपयोगी है?

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Analytics choices

01What can cause salt accumulation in soil in dry regions?

02Why can soil become acidic in high rainfall areas?

03Red color of soil may be related to what?

04Dark color of soil can generally show abundance of what?

05How can aeration be in waterlogged soil?

06Transported soil forms from what material?

07Which type of soil can form from river deposited material?

08What is fine dust like material deposited by wind called?

09What is the main characteristic of glacial till?

10Laterization is greater under which condition?

11Which material accumulates during calcification?

12Podzolization is more associated with which environment?

13Gleization is linked with which condition?

14Roots growing in rock cracks are an example of what?

15What effect can repeated heating and cooling have on rock?

16How does freeze and thaw action help soil formation?

17Oxidation can help color change related to which mineral?

18In carbonation water becomes mildly acidic due to which gas?

19What do minerals do during hydration?

20What is the simplest reason for soil conservation?

21Which is the correct simple sequence of soil formation?

22How does mulching help in soil conservation?

23Why is terrace farming useful for conserving soil on hill slopes?